Iowa
99 counties · Pop: 3,190,369
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Counties in Iowa
Adair
County Seat: Greenfield
Pop: 7,152
Adams
County Seat: Corning
Pop: 3,704
Allamakee
County Seat: Waukon
Pop: 13,687
Appanoose
County Seat: Centerville
Pop: 12,317
Audubon
County Seat: Audubon
Pop: 5,496
Benton
County Seat: Vinton
Pop: 25,645
Black Hawk
County Seat: Waterloo
Pop: 131,228
Boone
County Seat: Boone
Pop: 26,234
Bremer
County Seat: Waverly
Pop: 25,062
Buchanan
County Seat: Independence
Pop: 21,175
Buena Vista
County Seat: Storm Lake
Pop: 19,620
Butler
County Seat: Allison
Pop: 14,439
Calhoun
County Seat: Rockwell City
Pop: 9,927
Carroll
County Seat: Carroll
Pop: 20,165
Cass
County Seat: Atlantic
Pop: 12,836
Cedar
County Seat: Tipton
Pop: 18,505
Cerro Gordo
County Seat: Mason City
Pop: 42,450
Cherokee
County Seat: Cherokee
Pop: 11,324
Chickasaw
County Seat: New Hampton
Pop: 11,933
Clarke
County Seat: Osceola
Pop: 9,395
Clay
County Seat: Spencer
Pop: 16,016
Clayton
County Seat: Elkader
Pop: 17,549
Clinton
County Seat: Clinton
Pop: 46,429
Crawford
County Seat: Denison
Pop: 16,820
Dallas
County Seat: Adel
Pop: 93,453
Davis
County Seat: Bloomfield
Pop: 9,000
Decatur
County Seat: Leon
Pop: 7,870
Delaware
County Seat: Manchester
Pop: 17,011
Des Moines
County Seat: Burlington
Pop: 38,979
Dickinson
County Seat: Spirit Lake
Pop: 17,258
Dubuque
County Seat: Dubuque
Pop: 98,276
Emmet
County Seat: Estherville
Pop: 9,208
Fayette
County Seat: West Union
Pop: 19,650
Floyd
County Seat: Charles City
Pop: 15,642
Franklin
County Seat: Hampton
Pop: 10,070
Fremont
County Seat: Sidney
Pop: 6,960
Greene
County Seat: Jefferson
Pop: 8,888
Grundy
County Seat: Grundy Center
Pop: 12,232
Guthrie
County Seat: Guthrie Center
Pop: 10,689
Hamilton
County Seat: Webster City
Pop: 14,773
Hancock
County Seat: Garner
Pop: 10,630
Hardin
County Seat: Eldora
Pop: 16,846
Harrison
County Seat: Logan
Pop: 14,049
Henry
County Seat: Mount Pleasant
Pop: 19,954
Howard
County Seat: Cresco
Pop: 9,158
Humboldt
County Seat: Dakota City
Pop: 9,558
Ida
County Seat: Ida Grove
Pop: 6,860
Iowa
County Seat: Marengo
Pop: 16,184
Jackson
County Seat: Maquoketa
Pop: 19,439
Jasper
County Seat: Newton
Pop: 37,185
Jefferson
County Seat: Fairfield
Pop: 18,295
Johnson
County Seat: Iowa City
Pop: 151,140
Jones
County Seat: Anamosa
Pop: 20,681
Keokuk
County Seat: Sigourney
Pop: 10,246
Kossuth
County Seat: Algona
Pop: 14,813
Lee
County Seat: Fort Madison
Pop: 33,657
Linn
County Seat: Cedar Rapids
Pop: 226,706
Louisa
County Seat: Wapello
Pop: 10,874
Lucas
County Seat: Chariton
Pop: 8,600
Lyon
County Seat: Rock Rapids
Pop: 11,755
Madison
County Seat: Winterset
Pop: 16,338
Mahaska
County Seat: Oskaloosa
Pop: 22,095
Marion
County Seat: Knoxville
Pop: 33,253
Marshall
County Seat: Marshalltown
Pop: 39,369
Mills
County Seat: Glenwood
Pop: 15,109
Mitchell
County Seat: Osage
Pop: 10,586
Monona
County Seat: Onawa
Pop: 8,615
Monroe
County Seat: Albia
Pop: 7,707
Montgomery
County Seat: Red Oak
Pop: 9,917
Muscatine
County Seat: Muscatine
Pop: 42,664
O Brien
County Seat: Primghar
Pop: 13,753
Osceola
County Seat: Sibley
Pop: 5,958
Page
County Seat: Clarinda
Pop: 15,107
Palo Alto
County Seat: Emmetsburg
Pop: 8,886
Plymouth
County Seat: Le Mars
Pop: 25,177
Pocahontas
County Seat: Pocahontas
Pop: 6,619
Polk
County Seat: Des Moines
Pop: 492,401
Pottawattamie
County Seat: Council Bluffs
Pop: 93,206
Poweshiek
County Seat: Montezuma
Pop: 18,504
Ringgold
County Seat: Mount Ayr
Pop: 4,894
Sac
County Seat: Sac City
Pop: 9,721
Scott
County Seat: Davenport
Pop: 173,205
Shelby
County Seat: Harlan
Pop: 11,454
Sioux
County Seat: Orange City
Pop: 34,855
Story
County Seat: Nevada
Pop: 98,537
Tama
County Seat: Toledo
Pop: 16,854
Taylor
County Seat: Bedford
Pop: 6,121
Union
County Seat: Creston
Pop: 12,241
Van Buren
County Seat: Keosauqua
Pop: 6,880
Wapello
County Seat: Ottumwa
Pop: 34,969
Warren
County Seat: Indianola
Pop: 51,466
Washington
County Seat: Washington
Pop: 21,965
Wayne
County Seat: Corydon
Pop: 6,441
Webster
County Seat: Fort Dodge
Pop: 35,904
Winnebago
County Seat: Forest City
Pop: 10,354
Winneshiek
County Seat: Decorah
Pop: 19,991
Woodbury
County Seat: Sioux City
Pop: 103,107
Worth
County Seat: Northwood
Pop: 7,381
Wright
County Seat: Clarion
Pop: 12,562