Condados en Illinois
- Adams
- Alexander
- Bond
- Boone
- Brown
- Bureau
- Calhoun
- Carroll
- Cass
- Champaign
- Christian
- Clark
- Clay
- Clinton
- Coles
- Cook
- Crawford
- Cumberland
- DeKalb
- DeWitt
- Douglas
- DuPage
- Edgar
- Edwards
- Effingham
- Fayette
- Ford
- Franklin
- Fulton
- Gallatin
- Greene
- Grundy
- Hamilton
- Hancock
- Hardin
- Henderson
- Henry
- Iroquois
- Jackson
- Jasper
- Jefferson
- Jersey
- Jo Daviess
- Johnson
- Kane
- Kankakee
- Kendall
- Knox
- Lake
- LaSalle
- Lawrence
- Lee
- Livingston
- Logan
- Macon
- Macoupin
- Madison
- Marion
- Marshall
- Mason
- Massac
- McDonough
- McHenry
- McLean
- Menard
- Mercer
- Monroe
- Montgomery
- Morgan
- Moultrie
- Ogle
- Peoria
- Perry
- Piatt
- Pike
- Pope
- Pulaski
- Putnam
- Randolph
- Richland
- Rock Island
- Saline
- Sangamon
- Schuyler
- Scott
- Shelby
- St. Clair
- Stark
- Stephenson
- Tazewell
- Union
- Vermilion
- Wabash
- Warren
- Washington
- Wayne
- White
- Whiteside
- Will
- Williamson
- Winnebago
- Woodford
Localidades en Illinois. Página 7 de 33
- Collison
- Colmar
- Coloma Township Whiteside County
- Colona
- Colona Township Henry County
- Colp
- Columbia
- Columbus
- Columbus Township Adams County
- Colusa
- Compromise Township Champaign County
- Compton
- Concord
- Concord Township Adams County
- Concord Township Bureau County
- Concord Township Iroquois County
- Condit Township Champaign County
- Congerville
- Cooksville
- Cooperstown Township Brown County
- Cooper Township Sangamon County
- Copley Township Knox County
- Coral Township Mchenry County
- Cordova
- Cordova Township Rock Island County
- Cornell
- Cornland
- Cornwall Township Henry County
- Cortland
- Cortland Township Dekalb County
- Corwin Township Logan County
- Cottage Hills
- Cotton Hill Township Sangamon County
- Coulterville
- Council Hill Township Jo Daviess County
- Countryside
- Country Club Hills
- Cowden
- Coyne Center
- Crainville
- Crane Creek Township Mason County
- Crater Precinct Calhoun County
- Creal Springs
- Creek Township Dewitt County
- Crescent City
- Crescent Township Iroquois County
- Creston
- Crestwood
- Crest Hill
- Crete
- Crete Township Will County
- Creve Coeur
- Crittenden Township Champaign County
- Cropsey Township Mclean County
- Crossville
- Cruger Township Woodford County
- Crystal Lake
- Crystal Lawns
- Cuba
- Cuba Township Lake County
- Cullom
- Cunningham Township Champaign County
- Curran Township Sangamon County
- Custer Township Will County
- Cutler
- Cypress
- Dahinda
- Dahlgren
- Dakota
- Dakota Township Stephenson County
- Dale Township Mclean County
- Dallas City Township Hancock County
- Dallas City
- Dalton City
- Dalzell
- Damiansville
- Dana
- Danforth
- Danforth Township Iroquois County
- Danvers