Iowa

Population Density
People per square mile, 1990:	49.7
People per square mile, 2000:	52.4

Year	Population		Year	Population		Year	Population
1790	0		1880	1,624,615		1970	2,825,368
1800	0		1890	1,912,297		1980	2,913,808
1810	0		1900	2,231,853		1990	2,776,755
1820	0		1910	2,224,771		2000	2,926,324
1830	0		1920	2,404,021		2010	3,009,907
1840	43,112		1930	2,470,939		2020	3,020,496
1850	192,914		1940	2,538,268		2030	2,955,172
1860	674,913		1950	2,621,073
1870	1,194,020		1960	2,757,537

Population By County

	Census 2000 Population	Change from 1990	Percent Change
IOWA	2,926,324	149,569	5.4
Adair County	8,243	-166	-2
Adams County	4,482	-384	-7.9
Allamakee County	14,675	820	5.9
Appanoose County	13,721	-22	-0.2
Audubon County	6,830	-504	-6.9
Benton County	25,308	2,879	12.8
Black Hawk County	128,012	4,214	3.4
Boone County	26,224	1,038	4.1
Bremer County	23,325	512	2.2
Buchanan County	21,093	249	1.2
Buena Vista County	20,411	446	2.2
Butler County	15,305	-426	-2.7
Calhoun County	11,115	-393	-3.4
Carroll County	21,421	-2	0
Cass County	14,684	-444	-2.9
Cedar County	18,187	806	4.6
Cerro Gordo County	46,447	-286	-0.6
Cherokee County	13,035	-1,063	-7.5
Chickasaw County	13,095	-200	-1.5
Clarke County	9,133	846	10.2
Clay County	17,372	-213	-1.2
Clayton County	18,678	-376	-2
Clinton County	50,149	-891	-1.7
Crawford County	16,942	167	1
Dallas County	40,750	10,995	37
Davis County	8,541	229	2.8
Decatur County	8,689	351	4.2
Delaware County	18,404	369	2
Des Moines County	42,351	-263	-0.6
Dickinson County	16,424	1,515	10.2
Dubuque County	89,143	2,740	3.2
Emmet County	11,027	-542	-4.7
Fayette County	22,008	165	0.8
Floyd County	16,900	-158	-0.9
Franklin County	10,704	-660	-5.8
Fremont County	8,010	-216	-2.6
Greene County	10,366	321	3.2
Grundy County	12,369	340	2.8
Guthrie County	11,353	418	3.8
Hamilton County	16,438	367	2.3
Hancock County	12,100	-538	-4.3
Hardin County	18,812	-282	-1.5
Harrison County	15,666	936	6.4
Henry County	20,336	1,110	5.8
Howard County	9,932	123	1.3
Humboldt County	10,381	-375	-3.5
Ida County	7,837	-528	-6.3
Iowa County	15,671	1,041	7.1
Jackson County	20,296	346	1.7
Jasper County	37,213	2,418	6.9
Jefferson County	16,181	-129	-0.8
Johnson County	111,006	14,887	15.5
Jones County	20,221	777	4
Keokuk County	11,400	-224	-1.9
Kossuth County	17,163	-1,428	-7.7
Lee County	38,052	-635	-1.6
Linn County	191,701	22,934	13.6
Louisa County	12,183	591	5.1
Lucas County	9,422	352	3.9
Lyon County	11,763	-189	-1.6
Madison County	14,019	1,536	12.3
Mahaska County	22,335	813	3.8
Marion County	32,052	2,051	6.8
Marshall County	39,311	1,035	2.7
Mills County	14,547	1,345	10.2
Mitchell County	10,874	-54	-0.5
Monona County	10,020	-14	-0.1
Monroe County	8,016	-98	-1.2
Montgomery County	11,771	-305	-2.5
Muscatine County	41,722	1,815	4.5
O'Brien County	15,102	-342	-2.2
Osceola County	7,003	-264	-3.6
Page County	16,976	106	0.6
Palo Alto County	10,147	-522	-4.9
Plymouth County	24,849	1,461	6.2
Pocahontas County	8,662	-863	-9.1
Polk County	374,601	47,461	14.5
Pottawattamie County	87,704	5,076	6.1
Poweshiek County	18,815	-218	-1.1
Ringgold County	5,469	49	0.9
Sac County	11,529	-795	-6.5
Scott County	158,668	7,689	5.1
Shelby County	13,173	-57	-0.4
Sioux County	31,589	1,686	5.6
Story County	79,981	5,729	7.7
Tama County	18,103	684	3.9
Taylor County	6,958	-156	-2.2
Union County	12,309	-441	-3.5
Van Buren County	7,809	133	1.7
Wapello County	36,051	364	1
Warren County	40,671	4,638	12.9
Washington County	20,670	1,058	5.4
Wayne County	6,730	-337	-4.8
Webster County	40,235	-107	-0.3
Winnebago County	11,723	-399	-3.3
Winneshiek County	21,310	463	2.2
Woodbury County	103,877	5,601	5.7
Worth County	7,909	-82	-1
Wright County	14,334	65	0.5

SOURCE: U.S. Bureau of the Census

Also available: Iowa News

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