This is a list of census-designated places in the U.S. state of Illinois, by county.
Adams County
Alexander County
Boone County
Carroll County
Champaign County
Christian County
Clark County
Coles County
Crawford County
Cumberland County
DeWitt County
Fayette County
Franklin County
Hancock County
Henderson County
Henry County
Jackson County
Jasper County
Jefferson County
Jo Daviess County
Kane County
Kendall County
Knox County
Lake County
- Channel Lake
- Forest Lake
- Fox Lake Hills
- Gages Lake
- Grandwood Park
- Knollwood
- Lake Catherine
- Long Lake
- Venetian Village
LaSalle County
Lee County
Logan County
Macon County
Madison County
Mason County
McDonough County
McHenry County
- Alden
- Big Foot Prairie
- Burtons Bridge
- Chemung
- Coral
- Franklinville
- Harmony
- Hartland
- Lawrence
- Pistakee Highlands
- Ridgefield
- Riley
- Solon Mills
McLean County
Menard County
Mercer County
Morgan County
Moultrie County
Ogle County
Peoria County
Piatt County
Richland County
Rock Island County
- Barstow
- Buffalo Prairie
- Campbell's Island
- Coyne Center
- Edgington
- Illinois City
- Joslin
- Rock Island Arsenal
- Taylor Ridge
Scott County
Shelby County
St. Clair County
Stephenson County
Tazewell County
Vermilion County
Warren County
Whiteside County
Will County
- Andres
- Arbury Hills
- Bonnie Brae
- Crystal Lawns
- Custer Park
- Eagle Lake
- Fairmont
- Frankfort Square
- Goodenow
- Ingalls Park
- Lakewood Shores
- Lockport Heights
- Lorenzo
- Marley
- Plum Valley
- Preston Heights
- Rest Haven
- Ridgewood
- Ritchie
- Sunnyland
- Willowbrook
- Wilton Center
Williamson County
Winnebago County
Woodford County
Former CDPs
- Goodings Grove, incorporated in 2001 and renamed as village of Homer Glen
- West Peoria, incorporated in 1993
- Wonder Lake, annexed by village of Wonder Lake
See also
- List of municipalities in Illinois
- List of Illinois townships
- List of precincts in Illinois
- List of unincorporated communities in Illinois
