Counties in Illinois
Illinois has 102 counties. Each county profile includes income, poverty, housing costs, educational attainment, demographics, and employment data from the U.S. Census Bureau ACS 5-Year Estimates.
Counties often vary dramatically within a state — a metro-area county may have median incomes double that of a rural neighbor. Use the topic rankings below to see exactly how Illinois's counties compare on any measure.
Illinois Counties by Income
Illinois Counties by Poverty
Illinois Counties by Home Values
Illinois Counties by Education
Illinois Counties by Diversity
Adams County
Pop. 65,166
Alexander County
Pop. 5,042
Bond County
Pop. 16,627
Boone County
Pop. 53,316
Brown County
Pop. 6,320
Bureau County
Pop. 33,027
Calhoun County
Pop. 4,406
Carroll County
Pop. 15,621
Cass County
Pop. 12,826
Champaign County
Pop. 206,098
Christian County
Pop. 33,684
Clark County
Pop. 15,328
Clay County
Pop. 13,173
Clinton County
Pop. 36,899
Coles County
Pop. 46,689
Cook County
Pop. 5,185,812
Crawford County
Pop. 18,588
Cumberland County
Pop. 10,378
De Witt County
Pop. 15,461
DeKalb County
Pop. 100,512
Douglas County
Pop. 19,686
DuPage County
Pop. 927,263
Edgar County
Pop. 16,637
Edwards County
Pop. 6,118
Effingham County
Pop. 34,505
Fayette County
Pop. 21,380
Ford County
Pop. 13,396
Franklin County
Pop. 37,541
Fulton County
Pop. 33,259
Gallatin County
Pop. 4,857
Greene County
Pop. 11,837
Grundy County
Pop. 52,920
Hamilton County
Pop. 7,972
Hancock County
Pop. 17,434
Hardin County
Pop. 3,623
Henderson County
Pop. 6,284
Henry County
Pop. 48,948
Iroquois County
Pop. 26,746
Jackson County
Pop. 52,706
Jasper County
Pop. 9,233
Jefferson County
Pop. 36,808
Jersey County
Pop. 21,336
Jo Daviess County
Pop. 21,918
Johnson County
Pop. 13,350
Kane County
Pop. 516,097
Kankakee County
Pop. 106,833
Kendall County
Pop. 135,053
Knox County
Pop. 49,294
LaSalle County
Pop. 109,049
Lake County
Pop. 711,885
Lawrence County
Pop. 15,137
Lee County
Pop. 34,058
Livingston County
Pop. 35,659
Logan County
Pop. 27,870
Macon County
Pop. 102,591
Macoupin County
Pop. 44,566
Madison County
Pop. 264,631
Marion County
Pop. 37,294
Marshall County
Pop. 11,715
Mason County
Pop. 12,878
Massac County
Pop. 13,958
McDonough County
Pop. 27,102
McHenry County
Pop. 311,366
McLean County
Pop. 170,882
Menard County
Pop. 12,169
Mercer County
Pop. 15,619
Monroe County
Pop. 34,969
Montgomery County
Pop. 28,078
Morgan County
Pop. 32,621
Moultrie County
Pop. 14,469
Ogle County
Pop. 51,536
Peoria County
Pop. 179,831
Perry County
Pop. 20,810
Piatt County
Pop. 16,702
Pike County
Pop. 14,625
Pope County
Pop. 3,757
Pulaski County
Pop. 5,074
Putnam County
Pop. 5,600
Randolph County
Pop. 30,142
Richland County
Pop. 15,675
Rock Island County
Pop. 142,995
Saline County
Pop. 23,387
Sangamon County
Pop. 195,217
Schuyler County
Pop. 6,826
Scott County
Pop. 4,847
Shelby County
Pop. 20,867
St. Clair County
Pop. 254,777
Stark County
Pop. 5,324
Stephenson County
Pop. 44,042
Tazewell County
Pop. 130,555
Union County
Pop. 16,972
Vermilion County
Pop. 73,179
Wabash County
Pop. 11,199
Warren County
Pop. 16,576
Washington County
Pop. 13,682
Wayne County
Pop. 15,994
White County
Pop. 13,708
Whiteside County
Pop. 55,192
Will County
Pop. 698,450
Williamson County
Pop. 66,902
Winnebago County
Pop. 283,289
Woodford County
Pop. 38,348