Illinois Business Licenses
General Illinois Guides & Resources
These guides provide detailed, step-by-step instructions for starting a business or nonprofit, registering with state authorities, and establishing a compliant organization.
Business Resources:
Fast easy instructions and affordable support for filing your Illinois annual report.
Get your Illinois business license. Harbor Compliance assists with initial and renewal registrations in every state.
Get your Illinois construction licenses. Harbor Compliance assists with initial and renewal registrations in every state.
Licensing guide for energy industry registrations and licenses in Illinois. Find detailed application, renewal, and reporting requirements.
If you are looking to obtain a finance license in Illinois, Harbor Compliance can help.
Total cost, time, and step-by-step instructions to form a limited liability company in Illinois. Do it yourself or purchase our formation service.
Total cost, time, and step-by-step instructions on how to incorporate in Illinois. Do it yourself or purchase our incorporation service.
Illinois Business Licensing Guides and Information.
Total time, cost, and paperwork to start your business in Illinois today! Our affordable formation services are state-specific.
Nonprofit Resources:
How to Start a Nonprofit Organization
Total cost, time, and how to start a nonprofit in Illinois. Instruction and services to assist with your non-profit formation.
Comprehensive solutions (and free resources) to help manage your fundraising, tax exemption, license renewals, and other nonprofit compliance activities in Illinois, and across the US.
Illinois Business Licenses for Regulated Industries
Our licensing guides provide a wealth of information including requirements, filing instructions, fees, timelines to licensure, and more for a range of industries and activities.
Illinois Corporate Filings
These web pages provide detailed information on state filings required to form an entity, register a name, gain authority to operate, maintain good standing, and more.
- Illinois Entity Name Reservation
- Illinois Fictitious Name Registration & Renewal
- Illinois Nonprofit Articles of Incorporation
- Illinois Registered Agent Service
- Moving Your Company's Domicile to Illinois
- Obtain Illinois Certified Copies
- Reinstate Illinois Corporation LLC Nonprofit
- Start an Illinois 501(c)(3)
Illinois Tax Filings
Find the information you need to register for state taxes or seek tax exemptions.
- Illinois Employer (Payroll & Withholding Tax) Registration Service
- Illinois Sales & Use Tax Registration Service
- Illinois Sales Tax Exemption
- Illinois Tax Clearance Certificate
- Illinois Tax Exemption
Illinois State Licensing Agencies
Below is a listing of the state-level licensing agencies within Illinois that a business should check for business license requirements.
- Appellate Court Fifth District (IL)
- Appellate Court First District (IL)
- Appellate Court Fourth District (IL)
- Appellate Court Second District (IL)
- Appellate Court Third District (IL)
- Attorney General - Charitable Trust Bureau
- Attorney Registration and Disciplinary Commission
- Board of Examiners
- Board of Licensing for Professional Geologists
- Commerce Commission
- Department of Agriculture - Bureau of Warehouses
- Department of Agriculture - Seed Program
- Department of Employment Security
- Department of Environmental Health Protection - Plumbing Program
- Department of Financial and Professional Regulation
- Department of Financial and Professional Regulation - Bureau of Residential Finance
- Department of Financial and Professional Regulation - Division of Banking
- Department of Financial and Professional Regulation - Division of Financial Institutions - Consumer Credit Section
- Department of Financial and Professional Regulation - Division of Financial Institutions - Currency Exchange Section
- Department of Financial and Professional Regulation - Division of Professional Regulation - Division of Real Estate
- Department of Financial and Professional Regulation - Division of Professional Regulation - Private Detective, Private Alarm, Private Security, and Fingerprint Vendor Board
- Department of Financial and Professional Regulation - Division of Professional Regulation - Public Accountant Registration Committee
- Department of Financial and Professional Regulation - Division of Professional Regulation - Roofing Contractor Program
- Department of Financial and Professional Regulation - Division of Professional Regulation - State Board of Pharmacy
- Department of Financial and Professional Regulation - Home Medical Equipment and Services Board
- Department of Human Rights - Public Contracts Unit
- Department of Insurance
- Department of Labor
- Department of Labor - Fair Labor Standards Division - Nurse Agency Licensing Unit
- Department of Public Health - Division of Environmental Health
- Department of Revenue
- Department of Revenue State Tax Lien Registry
- Division of Environmental Health Protection - Asbestos Abatement Program
- Division of Environmental Health Protection - Lead Program
- Landscape Architect Registration Board
- Liquor Control Commission
- Office of the State Fire Marshal - Division of Fire Prevention
- Office of the State Fire Marshal - Elevator Safety Division
- Office of the State Fire Marshal Division of Boiler & Pressure Vessel Safety
- Secretary of State
- Secretary of State - Business Services Department
- Secretary of State - Vehicle Services - Dealer/Remitter Licensing Section
- Supreme Court
Illinois Local Business Licences
Below is a listing of the local jurisdictions within Illinois that a business should check for local business license requirements.
County / Parish
- Adams County
- Alexander County
- Bond County
- Boone County
- Brown County
- Bureau County
- Calhoun County
- Carroll County
- Cass County
- Champaign County
- Christian County
- Clark County
- Clay County
- Clinton County
- Coles County
- Cook County
- Crawford County
- Cumberland County
- De Witt County
- DeKalb County
- Douglas County
- DuPage County
- Edgar County
- Edwards County
- Effingham County
- Fayette County
- Ford County
- Franklin County
- Fulton County
- Gallatin County
- Greene County
- Grundy County
- Hamilton County
- Hancock County
- Hardin County
- Henderson County
- Henry County
- Iroquois County
- Jackson County
- Jasper County
- Jefferson County
- Jersey County
- Jo Daviess County
- Johnson County
- Kane County
- Kankakee County
- Kendall County
- Knox County
- Lake County
- LaSalle County
- Lawrence County
- Lee County
- Livingston County
- Logan County
- Macon County
- Macoupin County
- Madison County
- Marion County
- Marshall County
- Mason County
- Massac County
- McDonough County
- McHenry County
- McLean County
- Menard County
- Mercer County
- Monroe County
- Montgomery County
- Morgan County
- Moultrie County
- Ogle County
- Peoria County
- Perry County
- Piatt County
- Pike County
- Pope County
- Pulaski County
- Putnam County
- Randolph County
- Richland County
- Rock Island County
- Saline County
- Sangamon County
- Schuyler County
- Scott County
- Shelby County
- St. Clair County
- Stark County
- Stephenson County
- Tazewell County
- Union County
- Vermilion County
- Wabash County
- Warren County
- Washington County
- Wayne County
- White County
- Whiteside County
- Will County
- Williamson County
- Winnebago County
- Woodford County
City / Borough / Municipality / Neighborhood
- Abingdon
- Abington Township
- Adams Township
- Addieville
- Addison
- Addison Township
- Adeline
- Aetna Township
- Afton Township
- Akron Township
- Alba Township
- Albany
- Albany Township
- Albers
- Albion
- Alden Township
- Aledo
- Alexander
- Alexis
- Algonquin
- Algonquin Township
- Alhambra
- Alhambra Township
- Allen Township
- Allendale
- Allens Grove Township
- Allenville
- Allerton
- Allin Township
- Allison Township
- Alma
- Alma Township
- Alpha
- Alsey
- Alsip
- Altamont
- Alto Pass
- Alto Township
- Alton
- Altona
- Alvan (Alvin)
- Amboy
- Amboy Township
- Amity Township
- Anchor
- Anchor Township
- Andalusia
- Andalusia Township
- Anderson Township
- Andover
- Andover Township
- Anna
- Annapolis
- Annawan
- Annawan Township
- Antioch
- Antioch Township
- Appanoose Township
- Apple River
- Apple River Township
- Arcola
- Arcola Township
- Arenzville
- Arenzville Township
- Argenta
- Arispie Township
- Arlington
- Arlington Heights
- Armington
- Aroma Park
- Aroma Township
- Arrington Township
- Arrowsmith
- Arrowsmith Township
- Artesia Township
- Arthur
- Asbury Township
- Ash Grove Township (Iroquois County)
- Ash Grove Township (Shelby County)
- Ashkum
- Ashkum Township
- Ashland
- Ashland Township
- Ashley
- Ashley Township
- Ashmore
- Ashmore Township
- Ashton
- Ashton Township
- Assumption
- Assumption Township
- Astoria
- Astoria Township
- Athens
- Athensville Township
- Atkinson
- Atkinson Township
- Atlanta
- Atlanta Township
- Atlas Township
- Atwood
- Auburn
- Auburn Township (Clark County)
- Auburn Township (Sangamon County)
- Audubon Township
- Augusta
- Augusta Township
- Aurora
- Aurora Township
- Austin Township
- Aux Sable Township
- Ava
- Avena Township
- Aviston
- Avoca Township
- Avon
- Avon Township
- Ayers Township
- Baileyville
- Bainbridge Township
- Bald Bluff Township
- Bald Hill Township
- Baldwin
- Ball Township
- Banner
- Banner Township (Effingham County)
- Banner Township (Fulton County)
- Bannockburn
- Bardolph
- Barnett Township
- Barnhill
- Barr Township
- Barren Township
- Barrington
- Barrington Hills
- Barrington Township
- Barry
- Barry Township
- Bartelso
- Bartlett
- Bartonville
- Basco
- Batavia
- Batavia Township
- Batchtown
- Bath
- Bath Township
- Bay View Gardens
- Baylis
- Beach Park
- Bear Creek Township (Christian County)
- Bear Creek Township (Hancock County)
- Bear Grove Township
- Beardstown
- Beardstown Township
- Beaucoup Township
- Beaver Creek Township
- Beaver Township
- Beaverville
- Beaverville Township
- Beckemeyer
- Bedford Park
- Bedford Township
- Beecher
- Beecher City
- Belgium
- Belknap
- Bell Plain Township
- Belle Prairie City
- Belle Prairie Township
- Belle Rive
- Belleville
- Bellevue
- Bellflower
- Bellflower Township
- Bellmont
- Bellwood
- Belmont Township
- Belvidere
- Belvidere Township
- Bement
- Bement Township
- Benld
- Bennington Township
- Bensenville
- Benson
- Bentley
- Benton
- Benton Township (Franklin County)
- Benton Township (Lake County)
- Berkeley
- Berlin
- Berlin Township
- Bernadotte Township
- Berreman Township
- Berry Township
- Berwick Township
- Berwyn
- Bethalto
- Bethany
- Bethel Township
- Beverly Township
- Bible Grove Township
- Big Grove Township
- Big Mound Township
- Big Rock
- Big Rock Township
- Big Spring Township
- Biggsville
- Biggsville Township
- Bingham
- Bird Township
- Birmingham Township
- Bishop Hill
- Bishop Township
- Bismarck
- Blackberry Township
- Blackhawk Township
- Blair Township
- Blandinsville
- Blandinsville Township
- Blissville Township
- Bloom Township
- Bloomingdale
- Bloomingdale Township
- Bloomington
- Bloomington Township
- Blount Township
- Blue Island
- Blue Mound
- Blue Mound Township (Macon County)
- Blue Mound Township (McLean County)
- Blue Ridge Township
- Bluff Springs Township
- Bluffdale Township
- Bluffs
- Bluford
- Bois D'Arc Township
- Bolingbrook
- Bolo Township
- Bond Township
- Bondville
- Bone Gap
- Bonfield
- Bonnie
- Bonpas Township
- Bonus Township
- Boone Township
- Bourbon Township
- Bourbonnais
- Bourbonnais Township
- Bowdre Township
- Bowen
- Bowlesville Township
- Bowling Green Township
- Bowling Township
- Boynton Township
- Braceville
- Braceville Township
- Bradford
- Bradford Township
- Bradley
- Bradley Township
- Braidwood
- Breese
- Breese Township
- Bremen Township
- Brenton Township
- Bridgeport
- Bridgeport Township
- Bridgeview
- Brighton
- Brighton Township
- Brimfield
- Brimfield Township
- Bristol Township
- Broadlands
- Broadview
- Broadwell
- Broadwell Township
- Brocton
- Brookfield
- Brookfield Township
- Brooklyn
- Brooklyn Township (Lee County)
- Brooklyn Township (Schuyler County)
- Brookport
- Brookside Township
- Brookville Township
- Broughton
- Broughton Township
- Brouilletts Creek Township
- Brown Township
- Browning
- Browning Township (Franklin County)
- Browning Township (Schuyler County)
- Browns
- Brownstown
- Bruce Township
- Brushy Mound Township
- Brushy Township
- Brussels
- Bryant
- Buck Township
- Buckeye Township
- Buckhart Township
- Buckheart Township
- Buckhorn Township
- Buckingham
- Buckley
- Buckner
- Buda
- Buena Vista Township
- Buffalo
- Buffalo Grove
- Buffalo Hart Township
- Buffalo Prairie Township
- Buffalo Township
- Bull Valley
- Bulpitt
- Buncombe
- Bunker Hill
- Bunker Hill Township
- Burbank
- Bureau
- Bureau Junction
- Burgess Township
- Burlington
- Burlington Township
- Burnham
- Burns Township
- Burnt Prairie
- Burnt Prairie Township
- Burr Ridge
- Burritt Township
- Burton Township (Adams County)
- Burton Township (McHenry County)
- Bush
- Bushnell
- Bushnell Township
- Butler
- Butler Grove Township
- Butler Township
- Button Township
- Byron
- Byron Township
- Cabery
- Cahokia
- Cahokia Heights
- Cairo
- Caledonia
- Caledonia Township
- Calhoun
- Calumet City
- Calumet Park
- Calumet Township
- Camargo
- Camargo Township
- Cambria
- Cambridge
- Cambridge Township
- Camden
- Camden Township
- Camp Point
- Camp Point Township
- Campbell Hill
- Campton Hills
- Campton Township
- Campus
- Canoe Creek Township
- Canteen Township
- Canton
- Canton Township
- Cantrall
- Capital Township
- Capron
- Carbon Cliff
- Carbon Hill
- Carbondale
- Carbondale Township
- Carlinville
- Carlinville Township
- Carlock
- Carlyle
- Carlyle Township
- Carman Township
- Carmi
- Carmi Township
- Carol Stream
- Carpentersville
- Carrier Mills
- Carrier Mills Township
- Carrigan Township
- Carroll Township
- Carrollton
- Carrollton Township
- Carson Township
- Carterville
- Carthage
- Carthage Township
- Cartwright Township
- Cary
- Casey
- Casey Township
- Caseyville
- Caseyville Township
- Casner Township
- Cass Township
- Catlin
- Catlin Township
- Cave Township
- Cave-In-Rock
- Cazenovia Township
- Cedar Point
- Cedar Township
- Cedarville
- Central City
- Central Township
- Centralia
- Centralia Township
- Centreville Township
- Cerro Gordo
- Cerro Gordo Township
- Chadwick
- Chalmers Township
- Chambersburg Township
- Champaign
- Champaign Township
- Chandlerville
- Chandlerville Township
- Channahon
- Channahon Township
- Chapin
- Charleston
- Charleston Township
- Charlotte Township
- Chatham
- Chatham Township
- Chatsworth
- Chatsworth Township
- Chebanse
- Chebanse Township
- Chemung Township
- Cheney's Grove Township
- Chenoa
- Chenoa Township
- Cherry
- Cherry Grove-Shannon Township
- Cherry Valley
- Cherry Valley Township
- Chester
- Chester Township
- Chesterfield
- Chesterfield Township
- Chestnut Township
- Chicago
- Chicago Heights
- Chicago Ridge
- Chili Township
- Chillicothe
- Chillicothe Township
- Chouteau Township
- Chrisman
- Christopher
- Christy Township
- Cicero
- Cincinnati Township (Pike County)
- Cincinnati Township (Tazewell County)
- Cisco
- Cisne
- Cissna Park
- Claremont
- Claremont Township
- Clarendon Hills
- Clarion Township
- Clarksburg Township
- Clay City
- Clay City Township
- Clayton
- Clayton Township (Adams County)
- Clayton Township (Woodford County)
- Clear Lake Township
- Clement Township
- Cleveland
- Clifton
- Clinton
- Clinton Township
- Clintonia Township
- Clover Township
- Clyde Township
- Coal City
- Coal Valley
- Coal Valley Township
- Coalton
- Coatsburg
- Cobden
- Coe Township
- Coffeen
- Colchester
- Colchester Township
- Cold Spring Township
- Coldbrook Township
- Coleta
- Colfax
- Colfax Township
- Collinsville
- Collinsville Township
- Coloma Township
- Colona
- Colona Township
- Colp
- Columbia
- Columbus
- Columbus Township
- Compromise Township
- Compton
- Concord
- Concord Township (Adams County)
- Concord Township (Bureau County)
- Concord Township (Iroquois County)
- Condit Township
- Congerville
- Cooksville
- Cooper Township
- Cooperstown Township
- Copley Township
- Coral Township
- Cordova
- Cordova Township
- Cornell
- Cornwall Township
- Cortland
- Cortland Township
- Corwin Township
- Cottage Township
- Cotton Hill Township
- Cottonwood Township
- Coulterville
- Council Hill Township
- Country Club Hills
- Countryside
- Covington Township
- Cowden
- Crainville
- Crane Creek Township
- Creal Springs
- Creek Township
- Crescent City
- Crescent Township
- Crest Hill
- Creston
- Crestwood
- Crete
- Crete Township
- Creve Coeur
- Crittenden Township
- Crook Township
- Crooked Creek Township (Cumberland County)
- Crooked Creek Township (Jasper County)
- Cropsey Township
- Crossville
- Crouch Township
- Cruger Township
- Crystal Lake
- Cuba
- Cuba Township
- Cullom
- Curran
- Curran Township
- Custer Township
- Cutler
- Cypress
- Dahlgren
- Dahlgren Township
- Dakota
- Dakota Township
- Dale Township
- Dallas City
- Dallas City Township
- Dalton City
- Dalzell
- Damiansville
- Dana
- Danforth
- Danforth Township
- Danvers
- Danvers Township
- Danville
- Danville Township
- Darien
- Darwin Township
- Davis
- Davis Junction
- Dawson
- Dawson Township
- Dayton Township
- De Land
- De Soto
- De Soto Township
- De Witt
- De Witt Township
- Decatur
- Decatur Township
- Decker Township
- Deer Creek
- Deer Creek Township
- Deer Grove
- Deer Park
- Deer Park Township
- Deerfield
- Deerfield Township
- Degognia Township
- DeKalb
- DeKalb Township
- Delavan
- Delavan Township
- Dement Township
- Denison Township
- Denning Township
- Denver Township
- DePue
- Derinda Township
- Derry Township
- Des Plaines
- Detroit
- Detroit Township
- Diamond
- Dieterich
- Dillon Township
- Dimmick Township
- Divernon
- Divernon Township
- Dix
- Dix Township
- Dixmoor
- Dixon
- Dixon Township
- Dodds Township
- Dolson Township
- Dolton
- Dongola
- Donnellson
- Donovan
- Dora Township
- Dorchester
- Dorchester Township
- Dorr Township
- Douglas Township (Clark County)
- Douglas Township (Effingham County)
- Douglas Township (Iroquois County)
- Dover
- Dover Township
- Dowell
- Downers Grove
- Downers Grove Township
- Downs
- Downs Township
- Drummer Township
- Drury Township
- Dry Grove Township
- Dry Point Township
- Du Bois
- Du Bois Township
- Du Page Township
- Du Quoin
- Duncan Township
- Dundee
- Dunfermline
- Dunham Township
- Dunlap
- Dunleith Township
- Dupo
- Durand
- Durand Township
- Durham Township
- Dwight
- Dwight Township
- Eagarville
- Eagle Creek Township
- Eagle Point Township
- Eagle Township
- Earl Township
- Earlville
- East Alton
- East Bend Township
- East Brooklyn
- East Cape Girardeau
- East Carondelet
- East Dubuque
- East Dundee
- East Eldorado Township
- East Fork Township (Clinton County)
- East Fork Township (Montgomery County)
- East Galena Township
- East Galesburg
- East Gillespie
- East Grove Township
- East Hazel Crest
- East Lincoln Township
- East Moline
- East Nelson Township
- East Oakland Township
- East Peoria
- East Saint Louis
- Eastern Township
- Easton
- Eddyville
- Edelstein
- Eden Township
- Edford Township
- Edgar Township
- Edgewood
- Edgington Township
- Edinburg
- Edwards
- Edwardsville
- Edwardsville Township
- Effingham
- El Dara
- El Paso
- El Paso Township
- Ela Township
- Elba Township
- Elbridge Township
- Elburn
- Eldorado
- Eldorado Township
- Eldred
- Elgin
- Elgin Township
- Eliza Township
- Elizabeth
- Elizabeth Township
- Elizabethtown
- Elk Grove Township
- Elk Grove Village
- Elk Prairie Township
- Elk Township
- Elkhart
- Elkhart Township
- Elkhorn Grove Township
- Elkhorn Township
- Elkville
- Ellington Township
- Elliott
- Ellis Grove
- Ellison Township
- Ellisville
- Ellisville Township
- Ellsworth
- Elm Grove Township
- Elm River Township
- Elmhurst
- Elmira Township
- Elmwood
- Elmwood Park
- Elmwood Township
- Elsah
- Elsah Township
- Elvaston
- Elwood
- Elwood Township
- Embarrass Township
- Emden
- Eminence Township
- Emington
- Emma Township
- Emmet Township
- Empire Township
- Energy
- Enfield
- Enfield Township
- Engelmann Township
- English Township
- Eppards Point Township
- Equality
- Equality Township
- Erie
- Erie Township
- Erienna Township
- Erin Township
- Esmen Township
- Essex
- Essex Township (Kankakee County)
- Essex Township (Stark County)
- Eureka
- Evans Township
- Evanston
- Evansville
- Evergreen Park
- Ewing
- Ewing Township
- Exeter
- Fairbury
- Fairfield
- Fairfield Township
- Fairhaven Township
- Fairmont City
- Fairmount
- Fairmount Township
- Fairview
- Fairview Heights
- Fairview Township
- Fall Creek Township
- Fall River Township
- Fancy Creek Township
- Farina
- Farm Ridge Township
- Farmer City
- Farmers Township
- Farmersville
- Farmington
- Farmington Township
- Farrington Township
- Fayette Township
- Fayetteville
- Fayetteville Township
- Felix Township
- Fenton
- Ferris
- Fidelity
- Fidelity Township
- Field Township
- Fieldon
- Fillmore
- Fillmore Consolidated Township
- Findlay
- Fisher
- Fithian
- Flagg Township
- Flanagan
- Flannigan Township
- Flat Branch Township
- Flat Rock
- Flint Township
- Flora
- Flora Township
- Florence
- Florence Township (Stephenson County)
- Florence Township (Will County)
- Flossmoor
- Floyd Township
- Fondulac Township
- Foosland
- Ford Heights
- Forest City
- Forest City Township
- Forest Park
- Forest View
- Forrest
- Forrest Township
- Forreston
- Forreston Township
- Forsyth
- Fort Russell Township
- Fort Sheridan
- Foster Township (Madison County)
- Foster Township (Marion County)
- Fountain Bluff Township
- Fountain Creek Township
- Fountain Green Township
- Four Mile Township
- Fox Lake
- Fox River Grove
- Fox Township (Jasper County)
- Fox Township (Kendall County)
- Frankfort
- Frankfort Township (Franklin County)
- Frankfort Township (Will County)
- Franklin
- Franklin Grove
- Franklin Grove Township
- Franklin Park
- Franklin Township
- Frederick Township
- Freeburg
- Freeburg Township
- Freedom Township (Carroll County)
- Freedom Township (LaSalle County)
- Freeman Spur
- Freeport
- Fremont Township
- Friends Creek Township
- Fulton
- Fulton Township
- Fults
- Funks Grove Township
- Galatia
- Galatia Township
- Galena
- Galesburg
- Galesburg Township
- Galva
- Galva Township
- Ganeer Township
- Garden Hill Township
- Garden Plain Township
- Garden Prairie
- Gardner
- Gardner Township
- Garfield Township
- Garrett
- Garrett Township
- Gays
- Genesee Township
- Geneseo
- Geneseo Township
- Geneva
- Geneva Township
- Genoa
- Genoa Township
- Georgetown
- Georgetown Township
- German Township
- German Valley
- Germantown
- Germantown Hills
- Germantown Township
- Germanville Township
- Gibson City
- Gifford
- Gilberts
- Gillespie
- Gillespie Township
- Gilman
- Gilmer Township
- Girard
- Girard Township
- Gladstone
- Gladstone Township
- Glasford
- Glasgow
- Glen Carbon
- Glen Ellyn
- Glencoe
- Glendale Heights
- Glenview
- Glenwood
- Godfrey
- Godley
- Golconda
- Gold Hill Township
- Gold Township
- Golden
- Golden Gate
- Golf
- Good Hope
- Goode Township
- Goodfarm Township
- Goodfield
- Goose Creek Township
- Goose Lake Township
- Goreville
- Gorham
- Goshen Township
- Grafton
- Grafton Township
- Grand Detour Township
- Grand Prairie Township
- Grand Rapids Township
- Grand Ridge
- Grand Tower
- Grand Tower Township
- Grandview
- Grandview Township
- Grandville Township
- Granite City
- Granite City Township
- Grant Park
- Grant Township (Lake County)
- Grant Township (Vermilion County)
- Grantfork
- Granville
- Granville Township
- Gray Township
- Graymont
- Grayslake
- Grayville
- Great Lakes
- Green Garden Township
- Green Oaks
- Green Valley
- Greenbush Township
- Greene Township (Mercer County)
- Greene Township (Woodford County)
- Greenfield
- Greenfield Township
- Greenup
- Greenup Township
- Greenview
- Greenville
- Greenville Township
- Greenwood
- Greenwood Township (Christian County)
- Greenwood Township (McHenry County)
- Gridley
- Gridley Township
- Griggsville
- Griggsville Township
- Grisham Township
- Grove Township
- Groveland
- Grover Township
- Guilford Township
- Gulfport
- Gurnee
- Hadley Township
- Hagener Township
- Hahnaman Township
- Haines Township
- Hainesville
- Hale Township
- Hall Township
- Hallock Township
- Hamburg
- Hamel
- Hamel Township
- Hamilton
- Hamilton Township
- Hammond
- Hampshire
- Hampshire Township
- Hampton
- Hampton Township
- Hanaford
- Hancock Township
- Hanna City
- Hanna Township
- Hanover
- Hanover Park
- Hanover Township (Cook County)
- Hanover Township (Jo Daviess County)
- Hardin
- Hardin Township
- Harlem Township (Stephenson County)
- Harlem Township (Winnebago County)
- Harmon
- Harmon Township
- Harmony Township
- Harp Township
- Harris Township
- Harrisburg
- Harrisburg Township
- Harrison Township
- Harristown
- Harristown Township
- Harter Township
- Hartford
- Hartland Township
- Hartsburg
- Harvard
- Harvel
- Harvel Township
- Harvey
- Harwood Heights
- Harwood Township
- Havana
- Havana Township
- Haw Creek Township
- Hawthorn Woods
- Hawthorne Township
- Hazel Crest
- Hebron
- Hebron Township
- Hecker
- Helvetia Township
- Henderson
- Henderson Township
- Hennepin
- Hennepin Township
- Henning
- Henry
- Henry Township
- Hensley Township
- Heralds Prairie Township
- Herrick
- Herrick Township
- Herrin
- Herscher
- Hettick
- Heyworth
- Hickory Hill Township
- Hickory Hills
- Hickory Point Township
- Hickory Township
- Hidalgo
- Highland
- Highland Park
- Highland Township
- Highwood
- Hillcrest
- Hillsboro
- Hillsboro Township
- Hillsdale
- Hillside
- Hillview
- Hillyard Township
- Hinckley
- Hindsboro
- Hines
- Hinsdale
- Hire Township
- Hittle Township
- Hodgkins
- Hoffman
- Hoffman Estates
- Holiday Hills
- Holland Township
- Hollis Township
- Hollowayville
- Homer
- Homer Glen
- Homer Township
- Hometown
- Homewood
- Honey Creek Township (Adams County)
- Honey Creek Township (Crawford County)
- Honey Point Township
- Hoopeston
- Hooppole
- Hoosier Township
- Hope Township
- Hopedale
- Hopedale Township
- Hopewell
- Hopewell Township
- Hopkins Park
- Hopkins Township
- Houston Township
- Hoyleton
- Hoyleton Township
- Hudson
- Hudson Township
- Huey
- Hull
- Humboldt
- Humboldt Township
- Hume
- Hume Township
- Hunt City Township
- Hunter Township
- Huntley
- Huntsville Township
- Hurlbut Township
- Hurricane Township
- Hurst
- Hutsonville
- Hutsonville Township
- Hutton Township
- Illini Township
- Illiopolis
- Illiopolis Township
- Ina
- Independence Township
- Indian Creek
- Indian Creek Township
- Indian Grove Township
- Indian Head Park
- Indian Point Township
- Indian Prairie Township
- Indianola
- Indiantown Township
- Industry
- Industry Township
- Ingleside
- Inverness
- Iola
- Ipava
- Irishtown Township
- Iroquois
- Iroquois Township
- Irving
- Irving Township
- Irvington
- Irvington Township
- Irwin
- Isabel Township
- Island Grove Township
- Island Lake
- Itasca
- Iuka
- Iuka Township
- Ivesdale
- Jackson Township (Effingham County)
- Jackson Township (Will County)
- Jacksonville
- Jamaica Township
- Jarvis Township
- Jasper Township
- Jefferson Township
- Jeffersonville
- Jeisyville
- Jerome
- Jersey Township
- Jerseyville
- Jewett
- Johannisburg Township
- Johnsburg
- Johnson Township (Christian County)
- Johnson Township (Clark County)
- Johnsonville
- Johnston City
- Joliet
- Joliet Township
- Jonathan Creek Township
- Jonesboro
- Joppa
- Jordan Township
- Joshua Township
- Joy
- Jubilee Township
- Junction
- Junction City
- Justice
- Kampsville
- Kane
- Kane Township
- Kaneville
- Kaneville Township
- Kangley
- Kankakee
- Kankakee Township
- Kansas
- Kansas Township (Edgar County)
- Kansas Township (Woodford County)
- Kappa
- Karnak
- Kaskaskia
- Kaskaskia Township
- Keene Township
- Keenes
- Keensburg
- Keith Township
- Keithsburg
- Keithsburg Township
- Kell
- Kelly Township
- Kempton
- Kendall Township
- Kenilworth
- Kenney
- Kent Township
- Kerr Township
- Kerton Township
- Kewanee
- Kewanee Township
- Keyesport
- Kickapoo Township
- Kilbourne
- Kilbourne Township
- Kildeer
- Kincaid
- Kinderhook
- Kinderhook Township
- King Township
- Kingston
- Kingston Mines
- Kingston Township
- Kinkaid Township
- Kinmundy
- Kinmundy Township
- Kinsman
- Kirkland
- Kirkwood
- Knight Prairie Township
- Knox Township
- Knoxville
- La Clede Township
- La Fayette
- La Fox
- La Grange
- La Grange Park
- La Harpe
- La Harpe Township
- La Moille
- La Moille Township
- La Prairie
- La Prairie Township
- La Rose
- Lacon
- Lacon Township
- Ladd
- Laenna Township
- Lafayette Township (Coles County)
- Lafayette Township (Ogle County)
- Lagrange Township
- Lake Barrington
- Lake Bluff
- Lake Forest
- Lake Fork Township
- Lake in the Hills
- Lake Ka-Ho
- Lake Township
- Lake Villa
- Lake Villa Township
- Lake Zurich
- Lakemoor
- Lakewood
- Lakewood Township
- Lamard Township
- Lamoine Township
- Lamotte Township
- Lanark
- Lancaster Township
- Lanesville Township
- Lansing
- Laona Township
- Larkinsburg Township
- LaSalle
- LaSalle Township
- Latham
- Lawndale Township
- Lawrence Township
- Lawrenceville
- Le Roy
- Leaf River
- Leaf River Township
- Lebanon
- Lebanon Township
- Lee
- Lee Center Township
- Lee Township (Brown County)
- Lee Township (Fulton County)
- Leech Township
- Leef Township
- Leepertown Township
- Leland
- Leland Grove
- Lemont
- Lemont Township
- Lena
- Lenox Township
- Lenzburg
- Lenzburg Township
- Leonore
- Lerna
- LeRoy Township
- Levan Township
- Levee Township
- Lewistown
- Lewistown Township
- Lexington
- Lexington Township
- Leyden Township
- Liberty
- Liberty Township (Adams County)
- Liberty Township (Effingham County)
- Libertyville
- Libertyville Township
- Licking Township
- Lily Lake
- Lima
- Lima Township
- Limestone
- Limestone Township (Kankakee County)
- Limestone Township (Peoria County)
- Lincoln
- Lincoln Township
- Lincolnshire
- Lincolnwood
- Lindenhurst
- Linder Township
- Linn Township
- Lisbon
- Lisbon Township
- Lisle
- Lisle Township
- Litchfield
- Little Mackinaw Township
- Little Rock Township
- Little York
- Littleton
- Littleton Township
- Lively Grove Township
- Liverpool
- Liverpool Township
- Livingston
- Loami
- Loami Township
- Lockport
- Lockport Township
- Locust Township
- Loda
- Loda Township
- Logan
- Lomax
- Lomax Township
- Lombard
- London Mills
- Lone Grove Township
- Long Branch Township
- Long Creek
- Long Creek Township
- Long Grove
- Long Point
- Long Point Township
- Longview
- Looking Glass Township
- Loraine
- Loraine Township
- Loran Township
- Lostant
- Loudon Township
- Louisville
- Louisville Township
- Love Township
- Lovejoy Township
- Loves Park
- Lovington
- Lovington Township
- Lowe Township
- Lucas Township
- Ludlow
- Ludlow Township
- Lukin Township
- Lyman Township
- Lynchburg Township
- Lyndon
- Lyndon Township
- Lynn Township (Henry County)
- Lynn Township (Knox County)
- Lynnville
- Lynnville Township
- Lynwood
- Lyons
- Lyons Township
- Macedonia
- Machesney Park
- Mackinaw
- Mackinaw Township
- Macomb
- Macomb Township
- Macon
- Macon Township
- Madison
- Madison Township
- Maeystown
- Magnolia
- Magnolia Township
- Mahomet
- Mahomet Township
- Maine Township (Cook County)
- Maine Township (Grundy County)
- Makanda
- Makanda Township
- Malden
- Malone Township
- Malta
- Malta Township
- Manchester
- Manchester Township
- Manhattan
- Manhattan Township
- Manito
- Manito Township
- Manlius
- Manlius Township (Bureau County)
- Manlius Township (LaSalle County)
- Mansfield
- Manteno
- Manteno Township
- Maple Park
- Mapleton
- Maquon
- Maquon Township
- Marengo
- Marengo Township
- Marietta
- Marine
- Marine Township
- Marion
- Marion Township (Lee County)
- Marion Township (Ogle County)
- Marissa
- Marissa Township
- Mark
- Markham
- Maroa
- Maroa Township
- Marquette Heights
- Marrowbone Township
- Marseilles
- Marshall
- Marshall Township
- Martin Township (Crawford County)
- Martin Township (McLean County)
- Martinsburg Township
- Martinsville
- Martinsville Township
- Martinton
- Martinton Township
- Maryland Township
- Maryville
- Mascoutah
- Mascoutah Township
- Mason
- Mason City
- Mason City Township
- Mason Township
- Massilon Township
- Matherville
- Matteson
- Mattoon
- Mattoon Township
- Maunie
- Maxwell Township
- May Township (Christian County)
- May Township (Lee County)
- Mayberry Township
- Mayfield Township
- Maywood
- Mazon
- Mazon Township
- McClellan Township
- McClure
- McCook
- McCullom Lake
- McHenry
- McHenry Township
- McKee Township
- McKendree Township
- McLean
- McLeansboro
- McLeansboro Township
- McNabb
- Meacham Township
- Mechanicsburg
- Mechanicsburg Township
- Media
- Media Township
- Medina Township
- Medinah
- Medora
- Melrose Park
- Melrose Township (Adams County)
- Melrose Township (Clark County)
- Melvin
- Menard
- Mendon
- Mendon Township
- Mendota
- Mendota Township
- Menominee
- Menominee Township
- Mercer Township
- Meredosia
- Meriden Township
- Meridian Township
- Merrionette Park
- Metamora
- Metamora Township
- Metcalf
- Metropolis
- Mettawa
- Middlefork Township
- Middleport Township
- Middletown
- Midlothian
- Milan
- Milan Township
- Milford
- Milford Township
- Milks Grove Township
- Mill Creek
- Mill Shoals
- Mill Shoals Township
- Millbrook
- Millbrook Township
- Milledgeville
- Miller Township
- Millersburg Township
- Millington
- Mills Township
- Millstadt
- Millstadt Township
- Milo Township
- Milton
- Milton Township
- Mineral
- Mineral Township
- Minier
- Minonk
- Minonk Township
- Minooka
- Mission Township
- Mississippi Township
- Missouri Township
- Moccasin Township
- Modesto
- Mokena
- Moline
- Moline Township
- Momence
- Momence Township
- Mona Township
- Monee
- Monee Township
- Money Creek Township
- Monmouth
- Monmouth Township
- Monroe Center
- Monroe Township
- Montebello Township
- Montezuma Township
- Montgomery
- Montgomery Township (Crawford County)
- Montgomery Township (Woodford County)
- Monticello
- Monticello Township
- Montmorency Township
- Montrose
- Moores Prairie Township
- Mooseheart
- Moraine Township
- Morgan Township
- Moro Township
- Morris
- Morris Township
- Morrison
- Morrisonville
- Morton
- Morton Grove
- Morton Township
- Mosquito Township
- Mossville
- Mound City
- Mound Station
- Mound Township (Effingham County)
- Mound Township (McDonough County)
- Mounds
- Mount Auburn
- Mount Auburn Township
- Mount Carmel
- Mount Carroll
- Mount Carroll Township
- Mount Clare
- Mount Erie
- Mount Erie Township
- Mount Hope Township
- Mount Morris
- Mount Morris Township
- Mount Olive
- Mount Olive Township
- Mount Pleasant Township
- Mount Prospect
- Mount Pulaski
- Mount Pulaski Township
- Mount Sterling
- Mount Sterling Township
- Mount Vernon
- Mount Vernon Township
- Mount Zion
- Mount Zion Township
- Mountain Township
- Moweaqua
- Moweaqua Township
- Muddy
- Mulberry Grove
- Mulberry Grove Township
- Muncie
- Mundelein
- Munson Township
- Murdock Township
- Murphysboro
- Murphysboro Township
- Murrayville
- Na-Au-Say Township
- Nachusa Township
- Nameoki Township
- Naperville
- Naperville Township
- Naplate
- Naples
- Nashville
- Nashville Township
- Nason
- Nauvoo
- Nauvoo Township
- Nebo
- Nebraska Township
- Nelson
- Nelson Township
- Neoga
- Neoga Township
- Neponset
- Neponset Township
- Nettle Creek Township
- Nevada Township
- New Athens
- New Athens Township
- New Baden
- New Bedford
- New Berlin
- New Berlin Township
- New Boston
- New Boston Township
- New Burnside
- New Canton
- New Douglas
- New Douglas Township
- New Grand Chain
- New Haven
- New Haven Township
- New Holland
- New Lenox
- New Lenox Township
- New Milford
- New Minden
- New Salem
- New Salem Township (McDonough County)
- New Salem Township (Pike County)
- New Trier Township
- Newark
- Newburg Township
- Newcomb Township
- Newell Township
- Newman
- Newman Township
- Newmansville Township
- Newport Township
- Newton
- Newton Township
- Newtown Township
- Niantic
- Niantic Township
- Niles
- Niles Township
- Nilwood
- Nilwood Township
- Nixon Township
- Noble
- Noble Township
- Nokomis
- Nokomis Township
- Nora
- Nora Township
- Normal
- Normal Township
- Norman Township
- Norridge
- Norris
- Norris City
- North Aurora
- North Barrington
- North Chicago
- North City
- North Fork Township
- North Henderson
- North Henderson Township
- North Litchfield Township
- North Muddy Township
- North Okaw Township
- North Otter Township
- North Palmyra Township
- North Pekin
- North Riverside
- North Utica
- Northbrook
- Northeast Township
- Northern Township
- Northfield
- Northfield Township
- Northlake
- Northville Township
- Norton Township
- Norwood
- Norwood Park Township
- Nunda Township
- O'Fallon
- O'Fallon Township
- Oak Brook
- Oak Forest
- Oak Grove
- Oak Lawn
- Oak Park
- Oakbrook Terrace
- Oakdale
- Oakdale Township
- Oakford
- Oakland
- Oakland Township
- Oakley Township
- Oakwood
- Oakwood Hills
- Oakwood Township
- Oblong
- Oblong Township
- Oconee
- Oconee Township
- Odell
- Odell Township
- Odin
- Odin Township
- Ogden
- Ogden Township
- Oglesby
- Ohio
- Ohio Grove Township
- Ohio Township
- Ohlman
- Okaw Township
- Okawville
- Okawville Township
- Old Mill Creek
- Old Ripley
- Old Ripley Township
- Old Shawneetown
- Old Town Township
- Olio Township
- Olive Township
- Olmsted
- Olney
- Olney Township
- Olympia Fields
- Omaha
- Omaha Township
- Omega Township
- Omphghent Township
- Onarga
- Onarga Township
- Oneco Township
- Oneida
- Ontario Township
- Ophir Township
- Oquawka
- Oquawka Township
- Ora Township
- Oran Township
- Orange Township (Clark County)
- Orange Township (Knox County)
- Orangeville
- Orchard Township
- Oreana
- Oregon
- Oregon-Nashua Township
- Orel Township
- Orient
- Orion
- Orion Township
- Orland Hills
- Orland Park
- Orland Township
- Orvil Township
- Osage Township
- Osceola Township
- Osco Township
- Oskaloosa Township
- Oswego
- Oswego Township
- Otego Township
- Ottawa
- Ottawa Township
- Otter Creek Township (Jersey County)
- Otter Creek Township (LaSalle County)
- Otterville
- Otto Township
- Owaneco
- Owego Township
- Owen Township
- Oxford Township
- Palatine Township
- Palestine
- Palestine Township
- Palmer
- Palmyra
- Palmyra Township
- Palos Heights
- Palos Hills
- Palos Park
- Palos Township
- Pana
- Pana Township
- Panama
- Panola
- Panola Township
- Panther Creek Township
- Papineau
- Papineau Township
- Paradise Township
- Paris
- Paris Township
- Park City
- Park Forest
- Park Ridge
- Parker Township
- Parkersburg
- Partridge Township
- Patoka
- Patoka Township
- Patterson Township
- Patton Township
- Paw Paw
- Paw Paw Township
- Pawnee
- Pawnee Township
- Paxton
- Payson
- Payson Township
- Pea Ridge Township
- Peach Orchard Township
- Pearl
- Pearl City
- Pearl Township
- Pecatonica
- Pecatonica Township
- Pekin
- Pekin Township
- Pella Township
- Pembroke Township
- Pendleton Township
- Penn Township (Shelby County)
- Penn Township (Stark County)
- Pennsylvania Township
- Peoria
- Peoria City Township
- Peoria Heights
- Peotone
- Peotone Township
- Percy
- Perry
- Perry Township
- Perryton Township
- Persifer Township
- Peru
- Peru Township
- Pesotum
- Pesotum Township
- Petersburg
- Petty Township
- Phenix Township
- Philadelphia Township
- Phillips Township
- Phillipstown
- Philo
- Philo Township
- Phoenix
- Piasa Township
- Pickaway Township
- Pierce Township
- Pierron
- Pigeon Grove Township
- Pike Township
- Pilot Grove Township
- Pilot Knob Township
- Pilot Township (Kankakee County)
- Pilot Township (Vermilion County)
- Pin Oak Township
- Pinckneyville
- Pine Creek Township
- Pine Rock Township
- Pingree Grove
- Piper City
- Pitman Township
- Pittsburg
- Pittsfield
- Pittsfield Township
- Pixley Township
- Plainfield
- Plainfield Township
- Plainville
- Plano
- Plato Center
- Plato Township
- Plattville
- Pleasant Grove Township
- Pleasant Hill
- Pleasant Hill Township
- Pleasant Mound Township
- Pleasant Plains
- Pleasant Ridge Township
- Pleasant Township
- Pleasant Vale Township
- Pleasant Valley Township
- Pleasant View Township
- Plum Hill Township
- Plymouth
- Pocahontas
- Point Pleasant Township
- Polk Township
- Polo
- Pomona Township
- Pontiac
- Pontiac Township
- Pontoon Beach
- Pontoosuc
- Pontoosuc Township
- Pope Township
- Poplar Grove
- Poplar Grove Township
- Port Barrington
- Port Byron
- Port Byron Township
- Portland Township
- Posen
- Potomac
- Prairie City
- Prairie City Township
- Prairie Creek Township
- Prairie Du Long Township
- Prairie du Rocher
- Prairie Green Township
- Prairie Grove
- Prairie Township (Crawford County)
- Prairie Township (Edgar County)
- Prairie Township (Hancock County)
- Prairie Township (Shelby County)
- Prairieton Township
- Preemption Township
- Preston Township
- Princeton
- Princeton Township
- Princeville
- Princeville Township
- Prophetstown
- Prophetstown Township
- Prospect Heights
- Proviso Township
- Pulaski
- Putman Township
- Putnam
- Quarry Township
- Quincy
- Quiver Township
- Raccoon Township
- Radnor Township
- Radom
- Raleigh
- Raleigh Township
- Ramsey
- Ramsey Township
- Randolph Township
- Rankin
- Ransom
- Rantoul
- Rantoul Township
- Rapids City
- Raritan
- Raritan Township
- Rawlins Township
- Raymond
- Raymond Township (Champaign County)
- Raymond Township (Montgomery County)
- Reading Township
- Rector Township
- Red Bud
- Reddick
- Redmon
- Reed Township
- Reynolds
- Reynolds Township
- Rice Township
- Rich Township
- Richfield Township
- Richland Grove Township
- Richland Township (LaSalle County)
- Richland Township (Marshall County)
- Richland Township (Shelby County)
- Richmond
- Richmond Township
- Richton Park
- Richview
- Richview Township
- Richwood Township
- Richwoods Township
- Ricks Township
- Ridge Farm
- Ridge Township
- Ridgeland Township
- Ridgway
- Ridgway Township
- Ridott
- Ridott Township
- Riley Township
- Ringwood
- Rio
- Rio Township
- Ripley
- Ripley Township
- River Forest
- River Grove
- Riverdale
- Riverside
- Riverside Township (Adams County)
- Riverside Township (Cook County)
- Riverton
- Riverwoods
- Rivoli Township
- Roanoke
- Roanoke Township
- Robbins
- Roberts
- Roberts Township
- Robinson
- Robinson Township
- Rochelle
- Rochester
- Rochester Township
- Rock City
- Rock Creek Township
- Rock Creek-Lima Township
- Rock Falls
- Rock Grove Township
- Rock Island
- Rock Island Township
- Rock Run Township
- Rockbridge
- Rockbridge Township
- Rockdale
- Rockford
- Rockford Township
- Rockton
- Rockton Township
- Rockvale Township
- Rockville Township
- Rockwood
- Rocky Run-Wilcox Township
- Rogers Township
- Rolling Meadows
- Rome
- Romeoville
- Romine Township
- Roodhouse
- Roodhouse Township
- Rooks Creek Township
- Rosamond
- Roscoe
- Roscoe Township
- Rose Hill
- Rose Township
- Rosedale Township
- Rosefield Township
- Roselle
- Rosemont
- Roseville
- Roseville Township
- Rosiclare
- Ross Township (Edgar County)
- Ross Township (Pike County)
- Ross Township (Vermilion County)
- Rossville
- Round Grove Township
- Round Lake
- Round Lake Beach
- Round Lake Heights
- Round Lake Park
- Rountree Township
- Roxana
- Royal
- Royal Lakes
- Royalton
- Rozetta Township
- Rubicon Township
- Ruma
- Rural Township (Rock Island County)
- Rural Township (Shelby County)
- Rush Township
- Rushville
- Rushville Township
- Russell Township
- Russellville
- Rutland
- Rutland Township (Kane County)
- Rutland Township (LaSalle County)
- Rutledge Township
- Ruyle Township
- Sadorus
- Sadorus Township
- Sailor Springs
- Saint Anne
- Saint Jacob
- Saint Joseph
- Saint Libory
- Salem
- Salem Township (Carroll County)
- Salem Township (Knox County)
- Salem Township (Marion County)
- Salina Township
- Saline Township
- Salt Creek Township
- Sammons Point
- San Jose
- Sand Prairie Township
- Sand Ridge Township
- Sandoval
- Sandoval Township
- Sandwich
- Sandwich Township
- Sangamon Township
- Sangamon Valley Township
- Santa Anna Township
- Santa Fe Township
- Saratoga Township (Grundy County)
- Saratoga Township (Marshall County)
- Sargent Township
- Sauget
- Sauk Village
- Saunemin
- Saunemin Township
- Savanna
- Savanna Township
- Savoy
- Sawyerville
- Saybrook
- Scales Mound
- Scales Mound Township
- Schaumburg
- Schaumburg Township
- Schiller Park
- Schram City
- Sciota
- Sciota Township
- Scotland Township
- Scott Air Force Base
- Scott Township (Champaign County)
- Scott Township (Ogle County)
- Scottville
- Scottville Township
- Seaton
- Seatonville
- Secor
- Sefton Township
- Selby Township
- Seminary Township
- Senachwine Township
- Seneca
- Seneca Township
- Serena Township
- Sesser
- Seven Hickory Township
- Seward Township (Kendall County)
- Seward Township (Winnebago County)
- Shabbona
- Shabbona Township
- Shafter Township
- Shannon
- Sharon Township
- Shawnee Township
- Shawneetown
- Shaws Point Township
- Sheffield
- Shelbyville
- Shelbyville Township
- Sheldon
- Sheldon Township
- Sheridan
- Sheridan Township
- Sherman
- Sherman Township
- Sherrard
- Shields Township
- Shiloh
- Shiloh Township (Edgar County)
- Shiloh Township (Jefferson County)
- Shiloh Valley Township
- Shipman
- Shipman Township
- Shirland Township
- Shoal Creek Township
- Shorewood
- Shumway
- Sibley
- Sidell
- Sidell Township
- Sidney
- Sidney Township
- Sigel
- Sigel Township
- Silver Creek Township
- Silvis
- Simpson
- Sims
- Six Mile Township
- Skokie
- Sleepy Hollow
- Smallwood Township
- Smithboro
- Smithfield
- Smithton
- Smithton Township
- Somer Township
- Somerset Township
- Somonauk
- Somonauk Township
- Songer Township
- Sonora Township
- Sorento
- South Barrington
- South Beloit
- South Chicago Heights
- South Crouch Township
- South Dixon Township
- South Elgin
- South Flannigan Township
- South Fork Township
- South Grove Township
- South Holland
- South Homer Township
- South Hurricane Township
- South Jacksonville
- South Litchfield Township
- South Macon Township
- South Moline Township
- South Muddy Township
- South Ottawa Township
- South Otter Township
- South Palmyra Township
- South Pekin
- South Rock Island Township
- South Ross Township
- South Roxana
- South Twigg Township
- South Wheatland Township
- South Wilmington
- Southern View
- Southwest Township
- Sparland
- Sparta
- Sparta Township
- Spaulding
- Spillertown
- Spring Bay
- Spring Bay Township
- Spring Creek Township
- Spring Garden Township
- Spring Grove
- Spring Grove Township
- Spring Lake Township
- Spring Point Township
- Spring Township
- Spring Valley
- Springerton
- Springfield
- Springfield Township
- Squaw Grove Township
- St. Albans Township
- St. Anne Township
- St. Augustine
- St. Charles
- St. Charles Township
- St. Clair Township
- St. David
- St. Elmo
- St. Francis Township
- St. Francisville
- St. Jacob Township
- St. Johns
- St. Joseph Township
- St. Mary Township
- St. Peter
- St. Rose
- St. Rose Township
- Standard
- Standard City
- Stanford
- Stanford Township
- Stanton Township
- Staunton
- Staunton Township
- Ste. Marie
- Ste. Marie Township
- Steeleville
- Steger
- Sterling
- Sterling Township
- Steuben Township
- Stevenson Township
- Steward
- Stewardson
- Stickney
- Stickney Township
- Stillman Valley
- Stites Township
- Stockland Township
- Stockton
- Stockton Township
- Stone Park
- Stonefort
- Stonefort Township
- Stonington
- Stonington Township
- Stookey Township
- Stoy
- Strasburg
- Stratton Township
- Strawn
- Streamwood
- Streator
- Stronghurst
- Stronghurst Township
- Sublette
- Sublette Township
- Suez Township
- Sugar Creek Township
- Sugar Grove
- Sugar Grove Township
- Sugar Loaf Township
- Sullivan
- Sullivan Township (Livingston County)
- Sullivan Township (Moultrie County)
- Sullivant Township
- Summerfield
- Summit
- Summit Township
- Sumner
- Sumner Township (Kankakee County)
- Sumner Township (Warren County)
- Sumpter Township
- Sun River Terrace
- Sunbury Township
- Swan Township
- Swansea
- Sycamore
- Sycamore Township
- Symerton
- Symmes Township
- Table Grove
- Talkington Township
- Tallula
- Tamalco Township
- Tamaroa
- Tamms
- Tampico
- Tampico Township
- Tate Township
- Taylor Springs
- Taylor Township
- Taylorville
- Taylorville Township
- Techny
- Tennessee
- Tennessee Township
- Terre Haute Township
- Teutopolis
- Teutopolis Township
- Texas Township
- Thawville
- Thayer
- Thebes
- Third Lake
- Thomasboro
- Thompson Township
- Thompsonville
- Thomson
- Thornton
- Thornton Township
- Tilden
- Tilton
- Timber Township
- Timberlane
- Tinley Park
- Tiskilwa
- Todds Point Township
- Toledo
- Tolono
- Tolono Township
- Toluca
- Tompkins Township
- Tonica
- Tonti Township
- Topeka
- Toulon
- Toulon Township
- Tovey
- Towanda
- Towanda Township
- Tower Hill
- Tower Hill Township
- Tower Lakes
- Tremont
- Tremont Township
- Trenton
- Trivoli
- Trout Valley
- Troy
- Troy Grove
- Troy Grove Township
- Troy Township
- Truro Township
- Tunbridge Township
- Tuscola
- Tuscola Township
- Twigg Township
- Tyrone Township
- Ullin
- Union
- Union Grove Township
- Union Hill
- Union Township (Cumberland County)
- Union Township (Effingham County)
- Union Township (Fulton County)
- Union Township (Livingston County)
- Unity Township
- University Park
- Urbana
- Urbana Township
- Ursa
- Ursa Township
- Ustick Township
- Utica
- Valier
- Valley City
- Valley Township
- Valmeyer
- Vance Township
- Vandalia
- Vandalia Township
- Varna
- Venedy
- Venedy Township
- Venice
- Venice Township
- Vergennes
- Vergennes Township
- Vermilion
- Vermillion Township
- Vermont
- Vermont Township
- Vernon
- Vernon Hills
- Vernon Township
- Verona
- Versailles
- Versailles Township
- Victor Township
- Victoria
- Victoria Township
- Vienna
- Vienna Township
- Villa Grove
- Villa Park
- Village of Palatine
- Vinegar Hill Township
- Viola
- Viola Township
- Virden
- Virden Township
- Virgil
- Virgil Township
- Virginia
- Virginia Township
- Volo
- Wabash Township
- Waddams Township
- Wade Township (Clinton County)
- Wade Township (Jasper County)
- Wadsworth
- Waggoner
- Waldo Township
- Walker Township
- Walkerville Township
- Wall Township
- Wallace Township
- Walnut
- Walnut Grove Township (Knox County)
- Walnut Grove Township (McDonough County)
- Walnut Hill
- Walnut Township
- Walshville
- Walshville Township
- Waltham Township
- Waltonville
- Wamac
- Wapella
- Wapella Township
- Wards Grove Township
- Warren
- Warren Township (Jo Daviess County)
- Warren Township (Lake County)
- Warrensburg
- Warrenville
- Warsaw
- Washburn
- Washington
- Washington Park
- Washington Township (Carroll County)
- Washington Township (Tazewell County)
- Washington Township (Will County)
- Wataga
- Waterford Township
- Waterloo
- Waterman
- Watseka
- Watson
- Watson Township
- Wauconda
- Wauconda Township
- Waukegan
- Waukegan Township
- Wauponsee Township
- Waverly
- Wayne
- Wayne City
- Wayne Township
- Waynesville
- Waynesville Township
- Webber Township
- Wedron
- Weldon
- Weller Township
- Wellington
- Wenona
- Wenonah
- Wesley Township
- West Brooklyn
- West Chicago
- West City
- West Deerfield Township
- West Dundee
- West Frankfort
- West Galena Township
- West Jersey Township
- West Lincoln Township
- West Peoria
- West Point
- West Point Township
- West Salem
- West Township (Effingham County)
- West Township (McLean County)
- Westchester
- Western Mound Township
- Western Springs
- Western Township
- Westfield
- Westfield Township (Bureau County)
- Westfield Township (Clark County)
- Westmont
- Westville
- Wethersfield Township
- Wheatfield Township
- Wheatland Township (Bureau County)
- Wheatland Township (Fayette County)
- Wheatland Township (Will County)
- Wheaton
- Wheeler
- Wheeling
- Wheeling Township
- White City
- White Hall
- White Hall Township
- White Oak Township
- White Rock Township
- Whitefield Township
- Whitley Township
- Whitmore Township
- Wilberton Township
- Will Township
- Williams Township
- Williamsfield
- Williamson
- Williamsville
- Willisville
- Willow Branch Township
- Willow Creek Township
- Willow Hill
- Willow Hill Township
- Willow Springs
- Willowbrook
- Wilmette
- Wilmington
- Wilmington Township
- Wilson Township
- Wilsonville
- Wilton Township
- Winchester
- Windsor
- Windsor Township
- Winfield
- Winfield Township
- Winnebago
- Winnebago Township
- Winnetka
- Winslow
- Winslow Township
- Winthrop Harbor
- Witt
- Witt Township
- Wonder Lake
- Wood Dale
- Wood River
- Wood River Township
- Woodbine Township
- Woodbury Township
- Woodhull
- Woodland
- Woodland Township (Carroll County)
- Woodland Township (Fulton County)
- Woodlawn
- Woodridge
- Woodside Township
- Woodson
- Woodstock
- Woodstock Township
- Woodville Township
- Woosung Township
- Worden
- Worth
- Worth Township (Cook County)
- Worth Township (Woodford County)
- Wrights Township
- Wyanet
- Wyanet Township
- Wyoming
- Wyoming Township
- Wysox Township
- Wythe Township
- Xenia
- Xenia Township
- Yale
- Yates City
- Yates Township
- Yellowhead Township
- York Township (Carroll County)
- York Township (Clark County)
- York Township (DuPage County)
- Yorktown Township
- Yorkville
- Young America Township
- Young Hickory Township
- Zanesville Township
- Zeigler
- Zif Township
- Zion
- Zuma Township