Home >US Map >US States > Iowa > Iowa Counties

List of Iowa Counties and County Seats





Share |
The U.S. state of Iowa is divided into 99 counties. Explore list of California Counties and their County Seats in alphabetical order populations, areas and the date of formation.

List of Iowa Counties and County Seat

S.NCountyCounty SeatPopulation(2011)Area Formed
1Adair CountyGreenfield7,682569 sq miJanuary 15, 1851
2Adams CountyCorning4,029424 sq miJanuary 15, 1851
3Allamakee CountyWaukon14,330640 sq miFebruary 20, 1847
4Appanoose CountyCenterville12,884496 sq miFebruary 17, 1843
5Audubon CountyAudubon6,119443 sq miJanuary 15, 1851
6Benton CountyVinton26,076716 sq miDecember 21, 1837
7Black Hawk CountyWaterloo131,090567 sq miFebruary 17, 1843
8Boone CountyBoone26,306572 sq miJanuary 13, 1846
9Bremer CountyWaverly24,276428 sq miJanuary 15, 1851
10Buchanan CountyIndependence20,958571 sq miDecember 21, 1837
11Buena Vista CountyStorm Lake20,260575 sq miJanuary 15, 1851
12Butler CountyAllison14,867580 sq miJanuary 15, 1851
13Calhoun CountyRockwell City9,670570 sq miJanuary 15, 1851
14Carroll CountyCarroll20,816569 sq miJanuary 15, 1851
15Cass CountyAtlantic13,956564 sq miJanuary 15, 1851
16Cedar CountyTipton18,499580 sq miDecember 21, 1837
17Cerro Gordo CountyMason City44,151568 sq miJanuary 15, 1851
18Cherokee CountyCherokee12,072577 sq miJanuary 15, 1851
19Chickasaw CountyNew Hampton12,439505 sq miJanuary 15, 1851
20Clarke CountyOsceola9,286431 sq miJanuary 13, 1846
21Clay CountySpencer16,667569 sq miJanuary 15, 1851
22Clayton CountyElkader18,129779 sq miDecember 21, 1837
23Clinton CountyClinton49,116695 sq miDecember 21, 1837
24Crawford CountyDenison17,096714 sq miJanuary 15, 1851
25Dallas CountyAdel66,135586 sq miJanuary 13, 1846
26Davis CountyBloomfield8,753503 sq miFebruary 17, 1843
27Decatur CountyLeon8,457532 sq miJanuary 13, 1846
28Delaware CountyManchester17,764578 sq miDecember 21, 1837
29Des Moines CountyBurlington40,325416 sq miSeptember 6, 1834
30Dickinson CountySpirit Lake16,667381 sq miJanuary 15, 1851
31Dubuque CountyDubuque93,653608 sq miSeptember 6, 1834
32Emmet CountyEstherville10,302396 sq miJanuary 15, 1851
33Fayette CountyWest Union20,880731 sq miDecember 21, 1837
34Floyd CountyCharles City16,303501 sq miJanuary 15, 1851
35Franklin CountyHampton10,680582 sq miJanuary 15, 1851
36Fremont CountySidney7,441511 sq miFebruary 24, 1847
37Greene CountyJefferson9,336568 sq miJanuary 15, 1851
38Grundy CountyGrundy Center12,453503 sq miJanuary 15, 1851
39Guthrie CountyGuthrie Center10,954591 sq miJuly 8, 1851
40Hamilton CountyWebster City15,673577 sq miDecember 22, 1856
41Hancock CountyGarner11,341571 sq miJanuary 15, 1851
42Hardin CountyEldora17,534569 sq miJanuary 15, 1851
43Harrison CountyLogan14,928697 sq miJanuary 15, 1851
44Henry CountyMount Pleasant20,145434 sq miDecember 7, 1836
45Howard CountyCresco9,566473 sq miJanuary 15, 1851
46Humboldt CountyDakota City9,815434 sq miFebruary 26, 1857
47Ida CountyIda Grove7,089432 sq miJanuary 15, 1851
48Iowa CountyMarengo16,355586 sq miFebruary 17, 1843
49Jackson CountyMaquoketa19,848636 sq miDecember 21, 1837
50Jasper CountyNewton36,842730 sq miJanuary 13, 1846
51Jefferson CountyFairfield16,843435 sq miJanuary 21, 1839
52Johnson CountyIowa City130,882614 sq miDecember 21, 1837
53Jones CountyAnamosa20,638575 sq miDecember 21, 1837
54Keokuk CountySigourney10,511579 sq miDecember 21, 1837
55Kossuth CountyAlgona15,543973 sq miJanuary 15, 1851
56Lee CountyFort Madison and Keokuk35,862517 sq miDecember 7, 1836
57Linn CountyCedar Rapids211,226718 sq miDecember 21, 1837
58Louisa CountyWapello11,387402 sq miDecember 7, 1836
59Lucas CountyChariton8,898431 sq miJanuary 13, 1846
60Lyon CountyRock Rapids11,581588 sq miJanuary 15, 1851
61Madison CountyWinterset15,679561 sq miJanuary 13, 1846
62Mahaska CountyOskaloosa22,381571 sq miFebruary 17, 1843
63Marion CountyKnoxville33,309554 sq miJune 10, 1845
64Marshall CountyMarshalltown40,648572 sq miJanuary 13, 1846
65Mills CountyGlenwood15,059437 sq miJanuary 15, 1851
66Mitchell CountyOsage10,776469 sq miJanuary 15, 1851
67Monona CountyOnawa9,243693 sq miJanuary 15, 1851
68Monroe CountyAlbia7,970433 sq miFebruary 17, 1843
69Montgomery CountyRed Oak10,740424 sq miJanuary 15, 1851
70Muscatine CountyMuscatine42,745439 sq miDecember 7, 1836
71O'Brien CountyPrimghar14,398573 sq miJanuary 15, 1851
72Osceola CountySibley6,462399 sq miJanuary 15, 1851
73Page CountyClarinda15,932535 sq miFebruary 24, 1847
74Palo Alto CountyEmmetsburg9,421564 sq miJanuary 15, 1851
75Plymouth CountyLe Mars24,986864 sq miJanuary 15, 1851
76Pocahontas CountyPocahontas7,310578 sq miJanuary 15, 1851
77Polk CountyDes Moines430,640570 sq miJanuary 13, 1846
78Pottawattamie CountyCouncil Bluffs93,158954 sq miFebruary 24, 1847
79Poweshiek CountyMontezuma18,914585 sq miFebruary 17, 1843
80Ringgold CountyMount Ayr5,131538 sq miFebruary 24, 1847
81Sac CountySac City10,350576 sq miJanuary 15, 1851
82Scott CountyDavenport165,224458 sq miDecember 21, 1837
83Shelby CountyHarlan12,167591 sq miJanuary 15, 1851
84Sioux CountyOrange City33,704768 sq miJanuary 15, 1851
85Story CountyNevada89,542573 sq miJanuary 13, 1846
86Tama CountyToledo17,767721 sq miFebruary 17, 1843
87Taylor CountyBedford6,317534 sq miFebruary 24, 1847
88Union CountyCreston12,534424 sq miJanuary 15, 1851
89Van Buren CountyKeosauqua7,570485 sq miDecember 7, 1836
90Wapello CountyOttumwa35,625432 sq miFebruary 17, 1843
91Warren CountyIndianola46,225572 sq miJanuary 13, 1846
92Washington CountyWashington21,704569 sq miJanuary 25, 1839
93Wayne CountyCorydon6,403526 sq miJanuary 13, 1846
94Webster CountyFort Dodge38,013715 sq miJanuary 12, 1853
95Winnebago CountyForest City10,866400 sq miJanuary 15, 1851
96Winneshiek CountyDecorah21,056690 sq miFebruary 20, 1847
97Woodbury CountySioux City102,172873 sq miJanuary 12, 1853
98Worth CountyNorthwood7,598400 sq miJanuary 15, 1851
99Wright CountyClarion13,229581 sq miJanuary 15, 1851