Counties in Iowa, United States

County Name	Population	Water Area Percentage	Land Area Percentage
Adair County, IA	8,243	0.18%	99.82%
Adams County, IA	4,482	0.44%	99.56%
Allamakee County, IA	14,675	2.91%	97.09%
Appanoose County, IA	13,721	3.89%	96.11%
Audubon County, IA	6,830	0.1%	99.9%
Benton County, IA	25,308	0.29%	99.71%
Black Hawk County, IA	128,012	0.84%	99.16%
Boone County, IA	26,224	0.36%	99.64%
Bremer County, IA	23,325	0.39%	99.61%
Buchanan County, IA	21,093	0.36%	99.64%
Buena Vista County, IA	20,411	0.91%	99.09%
Butler County, IA	15,305	0.2%	99.8%
Calhoun County, IA	11,115	0.37%	99.63%
Carroll County, IA	21,421	0.16%	99.84%
Cass County, IA	14,684	0.12%	99.88%
Cedar County, IA	18,187	0.42%	99.58%
Cerro Gordo County, IA	46,447	1.18%	98.82%
Cherokee County, IA	13,035	0.03%	99.97%
Chickasaw County, IA	13,095	0.17%	99.83%
Clarke County, IA	9,133	0.14%	99.86%
Clay County, IA	17,372	0.63%	99.37%
Clayton County, IA	18,678	1.77%	98.23%
Clinton County, IA	50,149	2.14%	97.86%
Crawford County, IA	16,942	0.09%	99.91%
Dallas County, IA	40,750	0.89%	99.11%
Davis County, IA	8,541	0.33%	99.67%
Decatur County, IA	8,689	0.29%	99.71%
Delaware County, IA	18,404	0.21%	99.79%
Des Moines County, IA	42,351	3.18%	96.82%
Dickinson County, IA	16,424	5.61%	94.39%
Dubuque County, IA	89,143	1.36%	98.64%
Emmet County, IA	11,027	1.65%	98.35%
Fayette County, IA	22,008	0.07%	99.93%
Floyd County, IA	16,900	0.15%	99.85%
Franklin County, IA	10,704	0.1%	99.9%
Fremont County, IA	8,010	1.1%	98.9%
Greene County, IA	10,366	0.48%	99.52%
Grundy County, IA	12,369	0.01%	99.99%
Guthrie County, IA	11,353	0.41%	99.59%
Hamilton County, IA	16,438	0.13%	99.87%
Hancock County, IA	12,100	0.35%	99.65%
Hardin County, IA	18,812	0.12%	99.88%
Harrison County, IA	15,666	0.6%	99.4%
Henry County, IA	20,336	0.51%	99.49%
Howard County, IA	9,932	0.08%	99.92%
Humboldt County, IA	10,381	0.3%	99.7%
Ida County, IA	7,837	0.12%	99.88%
Iowa County, IA	15,671	0.15%	99.85%
Jackson County, IA	20,296	2.1%	97.9%
Jasper County, IA	37,213	0.4%	99.6%
Jefferson County, IA	16,181	0.32%	99.68%
Johnson County, IA	111,006	1.42%	98.58%
Jones County, IA	20,221	0.24%	99.76%
Keokuk County, IA	11,400	0.13%	99.87%
Kossuth County, IA	17,163	0.14%	99.86%
Lee County, IA	38,052	3.97%	96.03%
Linn County, IA	191,701	0.98%	99.02%
Louisa County, IA	12,183	3.77%	96.24%
Lucas County, IA	9,422	0.84%	99.17%
Lyon County, IA	11,763	0.02%	99.98%
Madison County, IA	14,019	0.21%	99.79%
Mahaska County, IA	22,335	0.44%	99.56%
Marion County, IA	32,052	2.86%	97.14%
Marshall County, IA	39,311	0.12%	99.88%
Mills County, IA	14,547	0.71%	99.29%
Mitchell County, IA	10,874	0.1%	99.9%
Monona County, IA	10,020	0.82%	99.18%
Monroe County, IA	8,016	0.16%	99.84%
Montgomery County, IA	11,771	0.22%	99.78%
Muscatine County, IA	41,722	2.32%	97.68%
O'Brien County, IA	15,102	0.03%	99.97%
Osceola County, IA	7,003	0.18%	99.82%
Page County, IA	16,976	0.1%	99.9%
Palo Alto County, IA	10,147	0.98%	99.02%
Plymouth County, IA	24,849	0.05%	99.95%
Pocahontas County, IA	8,662	0.25%	99.75%
Polk County, IA	374,601	3.81%	96.19%
Pottawattamie County, IA	87,704	0.59%	99.41%
Poweshiek County, IA	18,815	0.19%	99.81%
Ringgold County, IA	5,469	0.23%	99.77%
Sac County, IA	11,529	0.44%	99.56%
Scott County, IA	158,668	2.19%	97.81%
Shelby County, IA	13,173	0.09%	99.91%
Sioux County, IA	31,589	0.09%	99.91%
Story County, IA	79,981	0.15%	99.85%
Tama County, IA	18,103	0.15%	99.85%
Taylor County, IA	6,958	0.16%	99.84%
Union County, IA	12,309	0.37%	99.63%
Van Buren County, IA	7,809	1.17%	98.83%
Wapello County, IA	36,051	0.96%	99.04%
Warren County, IA	40,671	0.27%	99.73%
Washington County, IA	20,670	0.36%	99.64%
Wayne County, IA	6,730	0.28%	99.72%
Webster County, IA	40,235	0.39%	99.61%
Winnebago County, IA	11,723	0.27%	99.73%
Winneshiek County, IA	21,310	0.04%	99.96%
Woodbury County, IA	103,877	0.55%	99.45%
Worth County, IA	7,909	0.43%	99.57%
Wright County, IA	14,334	0.31%	99.69%

State Information	Safety and Environment
Official Site of Iowa State Population: 3,107,126 Iowa Counties	Natural Resource Office