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Illinois Census Data: Population & Housing Density

Population, Areas, and Housing Density for Illinois counties are shown in this easy-to-read table and chart combination.

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Source: U.S. Census Bureau 2000 Census.


Illinois Census Data: Population & Housing Density
LocationPopulationHousing unitsArea in square milesDensity per square mile of land areaLocation
Total areaWater areaLand areaPopulationHousing units
United States

281,421,906

115,904,641

3,794,083.06

256,644.62

3,537,438.44

79.6

32.8

United States
Illinois

12,419,293

4,885,615

57,914.38

2,330.79

55,583.58

223.4

87.9

Illinois
Adams Co.68,27729,386871.2814.64856.6379.734.3Adams Co.
Alexander Co.9,5904,591252.5416.16236.3840.619.4Alexander Co.
Bond Co.17,6336,690382.672.46380.2046.417.6Bond Co.
Boone Co.41,78615,414281.940.68281.27148.654.8Boone Co.
Brown Co.6,9502,456307.241.59305.6522.78.0Brown Co.
Bureau Co.35,50315,331873.304.74868.5640.917.7Bureau Co.
Calhoun Co.5,0842,681283.6929.87253.8220.010.6Calhoun Co.
Carroll Co.16,6747,945465.7721.56444.2137.517.9Carroll Co.
Cass Co.13,6955,784383.737.83375.9036.415.4Cass Co.
Champaign Co.179,66975,280997.530.73996.81180.275.5Champaign Co.
Christian Co.35,37214,992715.716.65709.0649.921.1Christian Co.
Clark Co.17,0087,816504.883.38501.5033.915.6Clark Co.
Clay Co.14,5606,394469.840.59469.2531.013.6Clay Co.
Clinton Co.35,53513,805503.4829.25474.2374.929.1Clinton Co.
Coles Co.53,19622,768510.071.78508.29104.744.8Coles Co.
Cook Co.5,376,7412,096,1211,635.04689.36945.685,685.62,216.5Cook Co.
Crawford Co.20,4528,785445.742.20443.5346.119.8Crawford Co.
Cumberland Co.11,2534,876347.000.98346.0232.514.1Cumberland Co.
DeKalb Co.88,96932,988634.970.81634.16140.352.0DeKalb Co.
De Witt Co.16,7987,282405.157.58397.5842.318.3De Witt Co.
Douglas Co.19,9228,005417.420.56416.8647.819.2Douglas Co.
DuPage Co.904,161335,621336.552.95333.612,710.31,006.0DuPage Co.
Edgar Co.19,7048,611624.180.63623.5531.613.8Edgar Co.
Edwards Co.6,9713,199222.660.31222.3531.414.4Edwards Co.
Effingham Co.34,26413,959479.901.20478.7071.629.2Effingham Co.
Fayette Co.21,8029,053725.368.87716.4930.412.6Fayette Co.
Ford Co.14,2416,060486.420.52485.9029.312.5Ford Co.
Franklin Co.39,01818,105431.4019.32412.0894.743.9Franklin Co.
Fulton Co.38,25016,240882.5916.97865.6244.218.8Fulton Co.
Gallatin Co.6,4453,071328.414.68323.7319.99.5Gallatin Co.
LocationPopulationHousing unitsArea in square milesDensity per square mile of land areaLocation
Total areaWater areaLand areaPopulationHousing units
United States

281,421,906

115,904,641

3,794,083.06

256,644.62

3,537,438.44

79.6

32.8

United States
Illinois

12,419,293

4,885,615

57,914.38

2,330.79

55,583.58

223.4

87.9

Illinois
Greene Co.14,7616,332546.343.25543.0927.211.7Greene Co.
Grundy Co.37,53515,040430.4210.52419.9089.435.8Grundy Co.
Hamilton Co.8,6213,983435.840.67435.1619.89.2Hamilton Co.
Hancock Co.20,1218,909814.5419.92794.6225.311.2Hancock Co.
Hardin Co.4,8002,494181.533.20178.3326.914.0Hardin Co.
Henderson Co.8,2134,126395.1216.31378.8121.710.9Henderson Co.
Henry Co.51,02021,270825.602.38823.2162.025.8Henry Co.
Iroquois Co.31,33413,3621,118.031.601,116.4328.112.0Iroquois Co.
Jackson Co.59,61226,844602.5314.40588.12101.445.6Jackson Co.
Jasper Co.10,1174,294498.023.62494.4020.58.7Jasper Co.
Jefferson Co.40,04516,990583.7112.76570.9670.129.8Jefferson Co.
Jersey Co.21,6688,918377.027.86369.1658.724.2Jersey Co.
Jo Daviess Co.22,28912,003618.7217.64601.0837.120.0Jo Daviess Co.
Johnson Co.12,8785,046348.884.25344.6337.414.6Johnson Co.
Kane Co.404,119138,998524.083.64520.44776.5267.1Kane Co.
Kankakee Co.103,83340,610681.444.70676.75153.460.0Kankakee Co.
Kendall Co.54,54419,519322.672.09320.58170.160.9Kendall Co.
Knox Co.55,83623,717719.703.42716.2878.033.1Knox Co.
Lake Co.644,356225,9191,367.95920.39447.561,439.7504.8Lake Co.
La Salle Co.111,50946,4381,148.0413.121,134.9298.340.9La Salle Co.
Lawrence Co.15,4527,014373.941.96371.9841.518.9Lawrence Co.
Lee Co.36,06214,310729.293.92725.3649.719.7Lee Co.
Livingston Co.39,67815,2971,045.431.671,043.7638.014.7Livingston Co.
Logan Co.31,18311,872619.010.87618.1450.419.2Logan Co.
McDonough Co.32,91313,289590.020.75589.2755.922.6McDonough Co.
McHenry Co.260,07792,908611.137.62603.51430.9153.9McHenry Co.
McLean Co.150,43359,9721,186.292.761,183.53127.150.7McLean Co.
Macon Co.114,70650,241585.384.86580.52197.686.5Macon Co.
Macoupin Co.49,01921,097867.614.04863.5756.824.4Macoupin Co.
Madison Co.258,941108,942740.3515.33725.02357.2150.3Madison Co.
LocationPopulationHousing unitsArea in square milesDensity per square mile of land areaLocation
Total areaWater areaLand areaPopulationHousing units
United States

281,421,906

115,904,641

3,794,083.06

256,644.62

3,537,438.44

79.6

32.8

United States
Illinois

12,419,293

4,885,615

57,914.38

2,330.79

55,583.58

223.4

87.9

Illinois
Marion Co.41,69118,022575.713.44572.2672.931.5Marion Co.
Marshall Co.13,1805,914398.5212.45386.0634.115.3Marshall Co.
Mason Co.16,0387,033563.3724.43538.9429.813.0Mason Co.
Massac Co.15,1616,951242.123.06239.0563.429.1Massac Co.
Menard Co.12,4865,285315.371.13314.2539.716.8Menard Co.
Mercer Co.16,9577,109568.887.86561.0230.212.7Mercer Co.
Monroe Co.27,61910,749397.719.42388.2971.127.7Monroe Co.
Montgomery Co.30,65212,525709.755.96703.8043.617.8Montgomery Co.
Morgan Co.36,61615,291572.263.51568.7664.426.9Morgan Co.
Moultrie Co.14,2875,743344.478.87335.6042.617.1Moultrie Co.
Ogle Co.51,03220,420763.274.43758.8367.326.9Ogle Co.
Peoria Co.183,43378,204630.8911.36619.52296.1126.2Peoria Co.
Perry Co.23,0949,457446.815.85440.9652.421.4Perry Co.
Piatt Co.16,3656,798440.330.31440.0237.215.4Piatt Co.
Pike Co.17,3848,011848.8718.57830.3020.99.6Pike Co.
Pope Co.4,4132,351374.643.77370.8611.96.3Pope Co.
Pulaski Co.7,3483,353203.332.55200.7936.616.7Pulaski Co.
Putnam Co.6,0862,888172.2412.45159.8038.118.1Putnam Co.
Randolph Co.33,89313,328597.2618.84578.4258.623.0Randolph Co.
Richland Co.16,1497,468362.011.87360.1444.820.7Richland Co.
Rock Island Co.149,37464,489451.1624.40426.75350.0151.1Rock Island Co.
St. Clair Co.256,082104,446673.9510.15663.81385.8157.3St. Clair Co.
Saline Co.26,73312,360386.983.67383.3169.732.2Saline Co.
Sangamon Co.188,95185,459877.018.82868.18217.698.4Sangamon Co.
Schuyler Co.7,1893,304441.394.07437.3116.47.6Schuyler Co.
Scott Co.5,5372,464252.771.85250.9222.19.8Scott Co.
Shelby Co.22,89310,060768.059.54758.5130.213.3Shelby Co.
Stark Co.6,3322,725288.210.28287.9422.09.5Stark Co.
Stephenson Co.48,97921,713564.720.54564.1886.838.5Stephenson Co.
Tazewell Co.128,48552,973657.899.03648.86198.081.6Tazewell Co.
LocationPopulationHousing unitsArea in square milesDensity per square mile of land areaLocation
Total areaWater areaLand areaPopulationHousing units
United States

281,421,906

115,904,641

3,794,083.06

256,644.62

3,537,438.44

79.6

32.8

United States
Illinois

12,419,293

4,885,615

57,914.38

2,330.79

55,583.58

223.4

87.9

Illinois
Union Co.18,2937,894422.135.97416.1644.019.0Union Co.
Vermilion Co.83,91936,349902.143.06899.0893.340.4Vermilion Co.
Wabash Co.12,9375,758227.764.29223.4757.925.8Wabash Co.
Warren Co.18,7357,787543.170.65542.5234.514.4Warren Co.
Washington Co.15,1486,385564.121.51562.6126.911.3Washington Co.
Wayne Co.17,1517,950715.561.66713.9024.011.1Wayne Co.
White Co.15,3717,393501.706.83494.8731.114.9White Co.
Whiteside Co.60,65325,025697.0112.24684.7788.636.5Whiteside Co.
Will Co.502,266175,524849.3912.45836.94600.1209.7Will Co.
Williamson Co.61,29627,703444.3820.96423.41144.865.4Williamson Co.
Winnebago Co.278,418114,404519.275.54513.74541.9222.7Winnebago Co.
Woodford Co.35,46913,487542.7414.79527.9567.225.5Woodford Co.

Reading the Chart:

The entries under the Area in square miles headings are areas.

The entries under the Population and Housing Units headings are totals.

The Density per square mile of land area values are derived by dividing the population (or housing unit) count by the land ares. For example, dividing the total US population of 281,421,906 by the total land area of 3,537,438.44 gives a density value of 79.6 people per square mile.

In this chart the length of all of the colored bars represent percentages of the highest value of any county in the state. For example, the county with the highest population will have a colored bar that fills the cell. A county with half that many people will have a colored bar that fills half the cell. The same method is used for the colored bars shown in the Area and Density table cells. For small percentages the bar does not appear.

Abbreviations used in location names: Co.=County, C.A.=Census Area, Pa.=Parish, Mu.=Municipio.

Interested in Illinois? Check out Illinois Climate for data and charts about average weather, daylight, and global warming.

Please note that if you set your browser to display very large text sizes, the table cell sizes will change, and the lengths of the colored bars will not be accurate, although they will still show proportions.

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