Census Charts Index > Iowa

Iowa Census Data: Population & Housing Density

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

Scroll down for information about Reading the chart.

Source: U.S. Census Bureau 2000 Census.


Iowa 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
Iowa

2,926,324

1,232,511

56,271.55

402.20

55,869.36

52.4

22.1

Iowa
Adair Co.8,2433,690570.311.00569.3014.56.5Adair Co.
Adams Co.4,4822,109425.411.87423.5410.65.0Adams Co.
Allamakee Co.14,6757,142658.7119.14639.5622.911.2Allamakee Co.
Appanoose Co.13,7216,697516.3520.10496.2527.613.5Appanoose Co.
Audubon Co.6,8302,995443.580.44443.1315.46.8Audubon Co.
Benton Co.25,30810,377718.452.06716.3935.314.5Benton Co.
Black Hawk Co.128,01251,759571.914.80567.11225.791.3Black Hawk Co.
Boone Co.26,22410,968573.512.05571.4645.919.2Boone Co.
Bremer Co.23,3259,337439.601.70437.9053.321.3Bremer Co.
Buchanan Co.21,0938,697573.352.09571.2636.915.2Buchanan Co.
Buena Vista Co.20,4118,145580.075.28574.7835.514.2Buena Vista Co.
Butler Co.15,3056,578581.561.18580.3826.411.3Butler Co.
Calhoun Co.11,1155,219572.292.14570.1519.59.2Calhoun Co.
Carroll Co.21,4219,019570.240.92569.3137.615.8Carroll Co.
Cass Co.14,6846,590565.010.68564.3326.011.7Cass Co.
Cedar Co.18,1877,570581.962.44579.5231.413.1Cedar Co.
Cerro Gordo Co.46,44721,488575.126.80568.3381.737.8Cerro Gordo Co.
Cherokee Co.13,0355,850577.340.18577.1522.610.1Cherokee Co.
Chickasaw Co.13,0955,593505.480.84504.6425.911.1Chickasaw Co.
Clarke Co.9,1333,934431.720.60431.1221.29.1Clarke Co.
Clay Co.17,3727,828572.513.63568.8930.513.8Clay Co.
Clayton Co.18,6788,619792.8114.00778.8124.011.1Clayton Co.
Clinton Co.50,14921,585710.1915.21694.9872.231.1Clinton Co.
Crawford Co.16,9426,958714.990.63714.3623.79.7Crawford Co.
Dallas Co.40,75016,529591.735.26586.4769.528.2Dallas Co.
Davis Co.8,5413,530504.891.65503.2417.07.0Davis Co.
Decatur Co.8,6893,833533.321.52531.8016.37.2Decatur Co.
Delaware Co.18,4047,682579.051.19577.8531.813.3Delaware Co.
Des Moines Co.42,35118,643429.8013.65416.15101.844.8Des Moines Co.
Dickinson Co.16,42411,375403.6922.63381.0643.129.9Dickinson 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
Iowa

2,926,324

1,232,511

56,271.55

402.20

55,869.36

52.4

22.1

Iowa
Dubuque Co.89,14335,505616.568.41608.16146.658.4Dubuque Co.
Emmet Co.11,0274,889402.386.63395.7427.912.4Emmet Co.
Fayette Co.22,0089,505731.450.52730.9230.113.0Fayette Co.
Floyd Co.16,9007,317501.310.74500.5633.814.6Floyd Co.
Franklin Co.10,7044,763583.010.57582.4418.48.2Franklin Co.
Fremont Co.8,0103,514516.765.68511.0815.76.9Fremont Co.
Greene Co.10,3664,623571.132.72568.4118.28.1Greene Co.
Grundy Co.12,3695,304502.550.03502.5124.610.6Grundy Co.
Guthrie Co.11,3535,467593.062.46590.6019.29.3Guthrie Co.
Hamilton Co.16,4387,082577.440.76576.6828.512.3Hamilton Co.
Hancock Co.12,1005,164573.142.03571.1121.29.0Hancock Co.
Hardin Co.18,8128,318569.930.68569.2633.014.6Hardin Co.
Harrison Co.15,6666,602700.934.20696.7222.59.5Harrison Co.
Henry Co.20,3368,246436.682.24434.4446.819.0Henry Co.
Howard Co.9,9324,327473.760.36473.4021.09.1Howard Co.
Humboldt Co.10,3814,645435.731.31434.4123.910.7Humboldt Co.
Ida Co.7,8373,506432.230.52431.7118.28.1Ida Co.
Iowa Co.15,6716,545587.350.90586.4526.711.2Iowa Co.
Jackson Co.20,2968,949649.7513.66636.0931.914.1Jackson Co.
Jasper Co.37,21315,659732.932.94729.9951.021.5Jasper Co.
Jefferson Co.16,1817,241436.721.38435.3437.216.6Jefferson Co.
Johnson Co.111,00645,831623.358.87614.48180.774.6Johnson Co.
Jones Co.20,2218,126576.701.39575.3135.114.1Jones Co.
Keokuk Co.11,4005,013579.940.75579.1919.78.7Keokuk Co.
Kossuth Co.17,1637,605974.391.38973.0117.67.8Kossuth Co.
Lee Co.38,05216,612538.7721.37517.3973.532.1Lee Co.
Linn Co.191,70180,551724.557.10717.44267.2112.3Linn Co.
Louisa Co.12,1835,133417.6415.73401.9230.312.8Louisa Co.
Lucas Co.9,4224,239434.173.63430.5521.99.8Lucas Co.
Lyon Co.11,7634,758587.630.13587.5020.08.1Lyon 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
Iowa

2,926,324

1,232,511

56,271.55

402.20

55,869.36

52.4

22.1

Iowa
Madison Co.14,0195,661562.301.16561.1425.010.1Madison Co.
Mahaska Co.22,3359,551573.402.53570.8739.116.7Mahaska Co.
Marion Co.32,05212,755570.5316.32554.2157.823.0Marion Co.
Marshall Co.39,31116,324573.020.70572.3268.728.5Marshall Co.
Mills Co.14,5475,671439.673.13436.5333.313.0Mills Co.
Mitchell Co.10,8744,594469.400.47468.9223.29.8Mitchell Co.
Monona Co.10,0204,660698.855.73693.1214.56.7Monona Co.
Monroe Co.8,0163,588434.110.70433.4118.58.3Monroe Co.
Montgomery Co.11,7715,399424.810.93423.8827.812.7Montgomery Co.
Muscatine Co.41,72216,786449.0710.40438.6795.138.3Muscatine Co.
O'Brien Co.15,1026,509573.250.17573.0826.411.4O'Brien Co.
Osceola Co.7,0033,012399.480.71398.7717.67.6Osceola Co.
Page Co.16,9767,302535.350.52534.8231.713.7Page Co.
Palo Alto Co.10,1474,631569.405.57563.8318.08.2Palo Alto Co.
Plymouth Co.24,8499,880863.960.39863.5628.811.4Plymouth Co.
Pocahontas Co.8,6623,988579.131.42577.7015.06.9Pocahontas Co.
Polk Co.374,601156,447591.9022.55569.35657.9274.8Polk Co.
Pottawattamie Co.87,70435,761959.945.68954.2691.937.5Pottawattamie Co.
Poweshiek Co.18,8158,556586.171.14585.0332.214.6Poweshiek Co.
Ringgold Co.5,4692,789538.921.26537.6710.25.2Ringgold Co.
Sac Co.11,5295,460578.382.56575.8220.09.5Sac Co.
Scott Co.158,66865,649468.1710.24457.93346.5143.4Scott Co.
Shelby Co.13,1735,459591.370.54590.8322.39.2Shelby Co.
Sioux Co.31,58911,260768.580.70767.8841.114.7Sioux Co.
Story Co.79,98130,630573.700.84572.86139.653.5Story Co.
Tama Co.18,1037,583722.371.07721.3025.110.5Tama Co.
Taylor Co.6,9583,199534.830.87533.9513.06.0Taylor Co.
Union Co.12,3095,657425.951.57424.3929.013.3Union Co.
Van Buren Co.7,8093,581490.555.73484.8216.17.4Van Buren Co.
Wapello Co.36,05115,873435.984.17431.8183.536.8Wapello 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
Iowa

2,926,324

1,232,511

56,271.55

402.20

55,869.36

52.4

22.1

Iowa
Warren Co.40,67115,289573.211.56571.6471.126.7Warren Co.
Washington Co.20,6708,543570.772.06568.7136.315.0Washington Co.
Wayne Co.6,7303,357527.081.48525.6012.86.4Wayne Co.
Webster Co.40,23516,969718.052.82715.2356.323.7Webster Co.
Winnebago Co.11,7235,065401.571.10400.4729.312.6Winnebago Co.
Winneshiek Co.21,3108,208689.880.27689.6130.911.9Winneshiek Co.
Woodbury Co.103,87741,394877.394.79872.59119.047.4Woodbury Co.
Worth Co.7,9093,534401.711.71400.0019.88.8Worth Co.
Wright Co.14,3346,559582.541.82580.7224.711.3Wright 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 Iowa? Check out Iowa 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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