This is a list of census-designated places in the U.S. state of Illinois, by county.
Adams County edit
Alexander County edit
Boone County edit
Carroll County edit
Champaign County edit
Christian County edit
Clark County edit
Coles County edit
Crawford County edit
Cumberland County edit
DeWitt County edit
Fayette County edit
Franklin County edit
Hancock County edit
Henderson County edit
Henry County edit
Jackson County edit
Jasper County edit
Jefferson County edit
Jo Daviess County edit
Kane County edit
Kendall County edit
Knox County edit
Lake County edit
LaSalle County edit
Lee County edit
Logan County edit
Macon County edit
Madison County edit
Mason County edit
McDonough County edit
McHenry County edit
McLean County edit
Menard County edit
Mercer County edit
Morgan County edit
Moultrie County edit
Ogle County edit
Peoria County edit
Piatt County edit
Richland County edit
Rock Island County edit
Scott County edit
Shelby County edit
St. Clair County edit
Stephenson County edit
Tazewell County edit
Vermilion County edit
Warren County edit
Whiteside County edit
Will County edit
Williamson County edit
Winnebago County edit
Woodford County edit
Former CDPs edit
- 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