Illinois Counties Map

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Hover/click a county for data.

Name 2022 Population Growth Since 2010 Land Area (mi²) Density (mi²)
Adams County64,871-3.41%855.2175.85
Alexander County4,921-40.03%235.5220.89
Bond County15,793-11.21%380.2841.53
Boone County53,736-0.67%280.74191.41
Brown County6,623-4.28%305.6121.67
Bureau County31,635-9.51%869.0336.40
Calhoun County4,469-12.30%253.8217.61
Carroll County14,278-7.25%445.0632.08
Cass County11,652-14.53%375.8131.00
Champaign County209,0023.70%996.26209.79
Christian County31,257-10.09%709.3844.06
Clark County14,964-8.15%501.4229.84
Clay County12,938-6.42%468.3327.63
Clinton County37,157-1.81%474.0878.38
Coles County49,997-7.18%508.2998.36
Cook County5,085,050-2.19%945.335,379.11
Crawford County18,178-8.20%443.6340.98
Cumberland County10,652-3.63%346.0330.78
DeKalb County106,5411.33%631.35168.75
De Witt County15,170-8.56%397.5538.16
Douglas County19,486-2.49%416.6646.77
DuPage County909,943-0.88%327.512,778.33
Edgar County16,564-10.50%623.3726.57
Edwards County6,419-4.68%222.4228.86
Effingham County33,489-2.15%478.7869.95
Fayette County21,240-4.03%716.4929.64
Ford County12,208-13.30%485.6125.14
Franklin County37,791-5.61%408.8992.42
Fulton County32,870-11.34%865.6037.97
Gallatin County4,177-25.05%323.0712.93
Greene County12,681-8.70%543.0223.35
Grundy County51,2972.28%418.05122.70
Hamilton County8,020-5.04%434.6718.45
Hancock County17,348-9.13%793.7321.86
Hardin County3,605-16.53%177.5320.31
Henderson County6,493-11.58%378.8717.14
Henry County48,445-3.98%823.0058.86
Iroquois County26,004-12.45%1,117.2923.27
Jackson County55,133-8.68%584.0794.39
Jasper County9,568-1.61%494.5219.35
Jefferson County37,612-2.95%571.1665.85
Jersey County21,707-5.60%369.2858.78
Jo Daviess County20,947-7.51%600.9134.86
Johnson County12,399-1.63%343.9236.05
Kane County531,4522.98%520.161,021.70
Kankakee County109,589-3.38%676.57161.98
Kendall County132,80915.11%320.29414.66
Knox County48,862-7.65%716.4268.20
Lake County687,379-2.38%443.661,549.33
LaSalle County107,199-5.82%1,135.1494.44
Lawrence County15,273-9.84%372.1841.04
Lee County33,496-6.91%724.8646.21
Livingston County35,450-8.76%1,044.2933.95
Logan County27,736-8.41%618.0644.88
McDonough County28,776-11.82%589.4148.82
McHenry County306,343-0.90%603.22507.85
McLean County168,838-0.57%1,183.35142.68
Macon County102,524-7.46%580.69176.56
Macoupin County43,750-8.47%862.9250.70
Madison County259,786-3.54%715.73362.96
Marion County36,677-6.95%572.3764.08
Marshall County11,303-10.56%386.7929.22
Mason County12,837-12.38%539.2423.81
Massac County13,019-15.35%237.2254.88
Menard County11,917-6.14%314.4437.90
Mercer County15,095-8.01%561.2026.90
Monroe County35,4297.38%385.0292.02
Montgomery County27,583-8.35%703.6939.20
Morgan County32,551-8.31%568.8057.23
Moultrie County14,060-5.38%335.9441.85
Ogle County50,229-5.96%758.5866.21
Peoria County174,856-6.10%619.19282.39
Perry County20,232-9.33%441.7745.80
Piatt County16,278-2.58%439.1737.07
Pike County15,459-5.70%831.4018.59
Pope County4,156-7.11%368.7711.27
Pulaski County5,038-17.76%199.1925.29
Putnam County5,748-4.39%160.1635.89
Randolph County30,597-8.57%575.5053.17
Richland County14,967-7.58%360.0141.57
Rock Island County139,653-5.39%427.46326.70
St. Clair County254,664-5.80%657.78387.15
Saline County22,597-9.26%379.8359.49
Sangamon County191,771-3.03%868.30220.86
Schuyler County6,462-14.24%437.2714.78
Scott County5,023-5.71%250.9120.02
Shelby County21,358-4.46%758.5428.16
Stark County5,114-14.32%288.0817.75
Stephenson County43,601-8.41%564.5577.23
Tazewell County129,862-4.15%649.08200.07
Union County16,116-9.11%413.4638.98
Vermilion County72,926-10.67%898.3781.18
Wabash County11,511-3.40%223.2551.56
Warren County16,400-7.41%542.4130.24
Washington County13,551-7.89%562.5724.09
Wayne County15,882-5.11%713.8122.25
White County13,294-8.93%494.7726.87
Whiteside County54,041-7.60%684.2578.98
Will County689,5251.58%836.94823.87
Williamson County65,442-1.49%420.17155.75
Winnebago County279,398-5.32%513.42544.19
Woodford County38,255-1.05%527.8172.48

Counties in Illinois

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)

Sources