COUNTY

DATE CREATED

COUNTY SEAT

PARENT

2 couples

Adair

15 Jan., 1851

Greenfield

Cass

Adams

15 Jan., 1851

Corning

Taylor

ALLAMAKEE

20 Feb., 1847

Waukon

Clayton

APPANOOSE

17 Feb., 1843

Centerville

Davis

Audubon

15 Jan., 1851

Audubon

Cass, Black Hawk

Benton

21 Dec., 1837

Vinton

Indian Lands

Black Hawk

17 Feb., 1843

Waterloo

Delaware

BOONE

13 Jan., 1846

Boone

Polk

Bremer

15 Jan., 1851

Waverly

Winnebago

BUCHANAN

21 Dec., 1837

Independence

Delaware

Buena Vista

15 Jan., 1851

Storm Lake

Sac, Clay

Butler

15 Jan., 1851

Allison

Buchanan, Black Hawk

Calhoun

15 Jan., 1851

Rockwell City

Carroll

15 Jan., 1851

Carroll

Guthrie

Cass

15 Jan., 1851

Atlantic

Keokuk, Pottawattamie

CEDAR

21 Dec., 1837

Tipton

Dubuque

Cerro Gordo

15 Jan., 1851

Mason City

Fayette, Floyd

Cherokee

15 Jan., 1851

Cherokee

Crawford

Chickasaw

15 Jan., 1851

New Hampton

Fayette

CLARKE

13 Jan., 1846

Osceola

Lucas

Clay

15 Jan., 1851

Spence

Indian Lands

CLAYTON

21 Dec., 1837

Elkader

Dubuque

CLINTON

21 Dec., 1837

Clinton

Dubuque

Crawford

15 Jan., 1851

Denison

Shelby

DALLAS

13 Jan., 1846

Adel

Polk

DAVIS

17 Feb., 1843

Bloomfield

Van Buren

Decatur

Courthouse Burned 1874

13 Jan., 1846

Leon

Appanoose

Delaware

21 Dec., 1837

Manchester

Dubuque

DES MOINES

06 Sept., 1834

Burlington

Michigan Territory

Dickinson

15 Jan., 1851

Spirit Lake

Kossuth

DUBUQUE

06 Sept., 1834

Dubuque

Michigan Territory

Emmit

15 Jan., 1851

Esterville

Kossuth, Dickinson

Fayette

21 Dec., 1837

West Union

Dubuque

Floyd

15 Jan., 1851

Charles City

Chickasaw

Franklin

15 Jan., 1851

Hampton

Chickasaw

FREMONT

24 Feb., 1847

Sidney

Pottawattamie

Greene

15 Jan., 1851

Jefferson

Dallas

Grundy

15 Jan., 1851

Grundy Center

Benton, Buchanan

Guthrie

15 Jan., 1851

Guthrie Center

Jackson

Hamilton

22 Dec., 1856

Webster City

Webster

Hancock

15 Jan., 1851

Garner

Fayette

Hardin

15 Jan., 1851

Eldora

Black Hawk

Harrison

15 Jan., 1851

Logan

Pottawattamie

HENRY

07, Dec., 1836

Mount Pleasant

Des Moines

Howard

Humboldt

15 Jan., 1851

Dakota City

Webster

Ida

15 Jan., 1851

Ida Grove

Cherokee

IOWA

17 Feb., 1843

Marengo

Washington

JACKSON

21 Dec., 1837

Maquoketa

Dubuque

JASPER

13 Jan., 1846

Newton

Mahaska

JEFFERSON

21 Jan., 1846

Fairfield

Henry

JOHNSON

21 Dec., 1837

Iowa City

Des Moines

JONES

21 Dec., 1837

Anamosa

Wisconsin Territory

KEOKUK

21 Dec., 1837

Sigourney

Washington

Kiskekosh

1843

Changed to  Monroe

Co. in 1846

Kossuth

15 Jan., 1851

Algona

Webster

LEE

07 Dec., 1836

Fort Madison

Des Moines

LINN

21 Dec., 1837

Cedar Rapids

Wisconsin Territory

LOUISA

07 Dec., 1836

Wapello

Des Moines

LUCAS

13 Jan., 1846

Chariton

Monroe

Lyon

15 Jan., 1851

Rock Rapids

Woodbury

MADISON

15 Feb., 1844

Winterset

Polk

MAHASKA

15 Feb., 1843

Oskaloosa

Indian Lands

MARION

10 June, 1845

Knoxville

Washington

MARSHALL

13 Jan., 1846

Marshalltown

Jasper

Mills

15 Jan., 1851

Glenwood

Pottawattamie

Mitchell

15 Jan., 1851

Osage

Chickasaw

Monona

15 Jan., 1851

Onawa

Crawford, Harrison

MONROE

17 Feb., 1843

Albia

Wapello

Montgomery

15 Jan., 1851

Redoak

Polk

MUSCATINE

07 Dec., 1836

Muscatine

Des Moines

O'Brien

15 Jan., 1851

Primghar

Cherokee

Osceola

15 Jan., 1851

Sibley

Woodbury

Page

24 Feb., 1847

Clarinda

Pottawattamie

Palo Alto

15 Jan., 1851

Emmetsburg

Kossuth

Plymouth

15 Jan., 1851

LeMars

Woodbury

Pocahontas

15 Jan., 1851

Pocahantas

Humboldt, Greene

POLK

13 Jan., 1846

Des Moines

Indian Lands

POTTAWATTAMIE

15 Jan., 1851            

Organized - 12 Oct., 1848

Council Buffs

Indian Lands

POWESHIECK

17 Feb., 1843

Montezuma

Indian Lands

Ringgold

24 Feb., 1847

Mount Ayr

Taylor

Sac

15 Jan., 1851

Sac City

Greene

SCOTT

21 Dec., 1837

Davenport

Wisconsin Territory

Shelby

15 Jan., 1851

Harlan

Cass

Sioux

15 Jan., 1851

Orange City

Plymouth

Slaughter

1837, Changed to

Washington   County

Story

13 Jan., 1846

Navada

Jasper, Polk, Boone

Tama

17 Feb., 1843

Toledo

Boone, Benton

Taylor

24 Feb., 1847

Bedford

Page

Union

15 Jan., 1851

Creston

Clarke

VAN BUREN

07 Dec., 1836

Keosauqua

Des Moines

WAPELLO

17 Feb., 1843

Ottumwa

Indian Lands

WARREN

13 Jan., 1846

Indianola

Polk

WASHINGTON

16 Jan., 1837

Washington

Louisa, Indian Lands

Wayne

13 Jan., 1846

Corydon

Appanoose

Webster

15 Jan., 1851

Fort Dodge

Yell, Risley

Winnebago

20 Feb., 1847

Forest City

Lossuth

Winneshiek

20 Feb., 1847

Decorah

Indian Lands

Woodbury

15 Jan., 1851

Sioux City

Indian Lands

Worth

15 Jan., 1851

Northwood

Mitchell

Wright

15 Jan., 1851

Clarion

Webster