County data explorer
Illinois county data and maps
Explore available county datasets, rankings and source notes.
Published topics
Rankings
Rankings describe published ACS estimates; follow each link for vintage and limitations.
Find a county
Links open county overviews where available and otherwise existing housing pages. The full alphabetical list works without JavaScript.
- Adams County GEOID 17001
- Alexander County GEOID 17003
- Bond County GEOID 17005
- Boone County GEOID 17007
- Brown County GEOID 17009
- Bureau County GEOID 17011
- Calhoun County GEOID 17013
- Carroll County GEOID 17015
- Cass County GEOID 17017
- Champaign County GEOID 17019
- Christian County GEOID 17021
- Clark County GEOID 17023
- Clay County GEOID 17025
- Clinton County GEOID 17027
- Coles County GEOID 17029
- Cook County GEOID 17031
- Crawford County GEOID 17033
- Cumberland County GEOID 17035
- De Witt County GEOID 17039
- DeKalb County GEOID 17037
- Douglas County GEOID 17041
- DuPage County GEOID 17043
- Edgar County GEOID 17045
- Edwards County GEOID 17047
- Effingham County GEOID 17049
- Fayette County GEOID 17051
- Ford County GEOID 17053
- Franklin County GEOID 17055
- Fulton County GEOID 17057
- Gallatin County GEOID 17059
- Greene County GEOID 17061
- Grundy County GEOID 17063
- Hamilton County GEOID 17065
- Hancock County GEOID 17067
- Hardin County GEOID 17069
- Henderson County GEOID 17071
- Henry County GEOID 17073
- Iroquois County GEOID 17075
- Jackson County GEOID 17077
- Jasper County GEOID 17079
- Jefferson County GEOID 17081
- Jersey County GEOID 17083
- Jo Daviess County GEOID 17085
- Johnson County GEOID 17087
- Kane County GEOID 17089
- Kankakee County GEOID 17091
- Kendall County GEOID 17093
- Knox County GEOID 17095
- Lake County GEOID 17097
- LaSalle County GEOID 17099
- Lawrence County GEOID 17101
- Lee County GEOID 17103
- Livingston County GEOID 17105
- Logan County GEOID 17107
- Macon County GEOID 17115
- Macoupin County GEOID 17117
- Madison County GEOID 17119
- Marion County GEOID 17121
- Marshall County GEOID 17123
- Mason County GEOID 17125
- Massac County GEOID 17127
- McDonough County GEOID 17109
- McHenry County GEOID 17111
- McLean County GEOID 17113
- Menard County GEOID 17129
- Mercer County GEOID 17131
- Monroe County GEOID 17133
- Montgomery County GEOID 17135
- Morgan County GEOID 17137
- Moultrie County GEOID 17139
- Ogle County GEOID 17141
- Peoria County GEOID 17143
- Perry County GEOID 17145
- Piatt County GEOID 17147
- Pike County GEOID 17149
- Pope County GEOID 17151
- Pulaski County GEOID 17153
- Putnam County GEOID 17155
- Randolph County GEOID 17157
- Richland County GEOID 17159
- Rock Island County GEOID 17161
- Saline County GEOID 17165
- Sangamon County GEOID 17167
- Schuyler County GEOID 17169
- Scott County GEOID 17171
- Shelby County GEOID 17173
- St. Clair County GEOID 17163
- Stark County GEOID 17175
- Stephenson County GEOID 17177
- Tazewell County GEOID 17179
- Union County GEOID 17181
- Vermilion County GEOID 17183
- Wabash County GEOID 17185
- Warren County GEOID 17187
- Washington County GEOID 17189
- Wayne County GEOID 17191
- White County GEOID 17193
- Whiteside County GEOID 17195
- Will County GEOID 17197
- Williamson County GEOID 17199
- Winnebago County GEOID 17201
- Woodford County GEOID 17203
Sources and limitations
Topic pages identify their sources, vintages, downloads and limitations. ACS estimates include survey uncertainty; crime counts are not population-normalized and do not establish safety or risk. PEP and ACS are distinct population series.