Iowa County Creation Dates and Parent Counties

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 * align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | Name of County
 * align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | Date Formed
 * align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | Boundary Changes
 * align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | Parent County
 * 1851 Jan 15
 * Details
 * Adair
 * Jan 15 | [[Adair
 * 
 * Cass
 * 1851 Jan 15
 * Details
 * Adams
 * Jan 15 | [[Adams
 * 
 * Taylor
 * 1847 7  18
 * Details
 * Allamakee
 * 7 18 | [[Allamakee
 * 
 * Clayton
 * 1843 Feb 17
 * Details
 * Appanoose
 * Feb 17 | [[Appanoose
 * 
 * Davis
 * 1851 rap no
 * Details
 * Audubon
 * rap no | [[Audubon
 * 
 * Cass, Black Hawk
 * 1837 Dec 21
 * Details
 * Benton
 * Dec 21 | [[Benton
 * 
 * old Dubuque
 * 1846 Jun 05
 * Details
 * Black Hawk
 * Jun 05 | [[Black Hawk
 * 
 * Delaware
 * 1846 Jun 05
 * Details
 * Boone
 * Jun 05 | [[Boone
 * 
 * Polk
 * 1851 Jan 15
 * Details
 * Bremer
 * Jan 15 | [[Bremer
 * 
 * nowrap="nowrap" | Winnebago Indian reserve
 * 1837 Dec 21
 * Details
 * Buchanan
 * Dec 21 | [[Buchanan
 * 
 * old Dubuque
 * 1851 Jan 15
 * Details
 * Buena Vista
 * Jan 15 | [[Buena Vista
 * 
 * Sac, Clay
 * 1851 Jan 15
 * Details
 * Butler
 * Jan 15 | [[Butler
 * 
 * Buchanan, Black Hawk
 * 1853 Jan 22
 * Details
 * Calhoun
 * Jan 22 | [[Calhoun
 * 
 * renamed from Fox
 * 1851 Jan 15
 * Details
 * Carroll
 * Jan 15 | [[Carroll
 * 
 * Gutherie
 * 1851 Jan 15
 * Details
 * Cass
 * Jan 15 | [[Cass
 * 
 * Pottawattamie
 * 1837 Dec 21
 * Details
 * Cedar
 * Dec 21 | [[Cedar
 * 
 * old Dubuque
 * 1851 Jan 15
 * Details
 * Cerro Gordo
 * Jan 15 | [[Cerro Gordo
 * 
 * Floyd
 * 1851 Jan 15
 * Details
 * Cherokee
 * Jan 15 | [[Cherokee
 * 
 * Crawford
 * 1851 Jan 15
 * Details
 * Chickasaw
 * Jan 15 | [[Chickasaw
 * 
 * Fayette
 * 1851 Jan 15
 * Details
 * Clarke
 * Jan 15 | [[Clarke
 * 
 * Lucas
 * 1851 Jan 15
 * Details
 * Clay
 * Jan 15 | [[Clay
 * 
 * Indian lands
 * 1837 Dec 21
 * Details
 * Clayton
 * Dec 21 | [[Clayton
 * 
 * old Dubuque
 * 1837 Dec 21
 * Details
 * Clinton
 * Dec 21 | [[Clinton
 * 
 * old Dubuque
 * 1836 Dec 07
 * Details
 * Cook
 * Dec 07 | [[Cook
 * 
 * Demoine
 * 1851 Jan 15
 * Details
 * Crawford
 * Jan 15 | [[Crawford
 * 
 * Shelby
 * 1846 Jan 17
 * Details
 * Dallas
 * Jan 17 | [[Dallas
 * 
 * Polk
 * 1843 Feb 17
 * Details
 * Davis
 * Feb 17 | [[Davis
 * 
 * Van Buren
 * 1846 Jan 17
 * Details
 * Decatur
 * Jan 17 | [[Decatur
 * 
 * Appanoose
 * 1837 Dec 21
 * Details
 * Delaware
 * Dec 21 | [[Delaware
 * 
 * old Dubuque
 * 1836 Dec 07
 * Details
 * Des Moines
 * Dec 07 | [[Des Moines
 * 
 * Demoine
 * 1851 Jan 15
 * Details
 * Dickinson
 * Jan 15 | [[Dickinson
 * 
 * Kossuth
 * 1837 Dec 21
 * Details
 * Dubuque
 * Dec 21 | [[Dubuque
 * 
 * old Dubuque
 * 1851 Jan 15
 * Details
 * Emmet
 * Jan 15 | [[Emmet
 * 
 * Kossuth, Dickinson
 * 1837 Dec 21
 * Details
 * Fayette
 * Dec 21 | [[Fayette
 * 
 * old Dubuque
 * 1851 Jan 15
 * Details
 * Floyd
 * Jan 15 | [[Floyd
 * 
 * Chickasaw
 * 1851 Jan 15
 * Details
 * Franklin
 * Jan 15 | [[Franklin
 * 
 * Chickasaw
 * 1847 7  18
 * Details
 * Fremont
 * 7 18 | [[Fremont
 * 
 * Pottawattamie
 * 1851 Jan 15
 * Details
 * Greene
 * Jan 15 | [[Greene
 * 
 * Dallas
 * 1851 Jan 15
 * Details
 * Grundy
 * Jan 15 | [[Grundy
 * 
 * Black Hawk
 * 1851 Jan 15
 * Details
 * Guthrie
 * Jan 15 | [[Guthrie
 * 
 * Jackson, Iowa
 * 1856 6  18
 * Details
 * Hamilton
 * 6 18 | [[Hamilton
 * 
 * Webster
 * 1851 Jan 15
 * Details
 * Hancock
 * Jan 15 | [[Hancock
 * 
 * Wright
 * 1851 Jan 15
 * Details
 * Hardin
 * Jan 15 | [[Hardin
 * 
 * Black Hawk
 * 1851 Jan 15
 * Details
 * Harrison
 * Jan 15 | [[Harrison
 * 
 * Pottawattamie
 * 1836 Dec 07
 * Details
 * Henry
 * Dec 07 | [[Henry
 * 
 * Demoine
 * 1851 Jan 15
 * Details
 * Howard
 * Jan 15 | [[Howard
 * 
 * Fayette
 * 1857 Feb 26
 * Details
 * Humboldt
 * Feb 26 | [[Humboldt
 * 
 * Webster
 * 1851 Jan 15
 * Details
 * Ida
 * Jan 15 | [[Ida
 * 
 * Buchanan, Benton
 * 1843 Feb 17
 * Details
 * Iowa
 * Feb 17 | [[Iowa
 * 
 * Washington
 * 1837 Dec 21
 * Details
 * Jackson
 * Dec 21 | [[Jackson
 * 
 * old Dubuque
 * 1846 Jan 17
 * Details
 * Jasper
 * Jan 17 | [[Jasper
 * 
 * Mahaska
 * 1839 Nov 04
 * Details
 * Jefferson
 * Nov 04 | [[Jefferson
 * 
 * Indian lands
 * 1837 Dec 21
 * Details
 * Johnson
 * Dec 21 | [[Johnson
 * 
 * old Dubuque
 * 1837 Dec 21
 * Details
 * Jones
 * Dec 21 | [[Jones
 * 
 * old Dubuque
 * 1837 Feb 17
 * Details
 * Keokuk
 * Feb 17 | [[Keokuk
 * 
 * old Keokuk
 * 1851 Jan 15
 * Details
 * Kossuth
 * Jan 15 | [[Kossuth
 * 
 * Fayette, Bancroft
 * 1836 Dec 07
 * Details
 * Lee
 * Dec 07 | [[Lee
 * 
 * Demoine
 * 1837 Dec 21
 * Details
 * Linn
 * Dec 21 | [[Linn
 * 
 * old Dubuque
 * 1836 Dec 07
 * Details
 * Louisa
 * Dec 07 | [[Louisa
 * 
 * Demoine
 * 1846 Jun 05
 * Details
 * Lucas
 * Jun 05 | [[Lucas
 * 
 * Monroe
 * 1862 Sep 11
 * Details
 * Lyon
 * Sep 11 | [[Lyon
 * 
 * renamed from Buncombe
 * 1844 Jun 16
 * Details
 * Madison
 * Jun 16 | [[Madison
 * 
 * Des Moines
 * 1843 Feb 17
 * Details
 * Mahaska
 * Feb 17 | [[Mahaska
 * 
 * Des Moines, Keokuk
 * 1845 rap no
 * Details
 * Marion
 * rap no | [[Marion
 * 
 * Des Moines, Keokuk
 * 1846 Jun 05
 * Details
 * Marshall
 * Jun 05 | [[Marshall
 * 
 * Benton
 * 1851 Jan 15
 * Details
 * Mills
 * Jan 15 | [[Mills
 * 
 * Pottawattamie
 * 1) VALUE!
 * Missouri Territory
 * 1) VALUE!
 * Became a non-county area in MO Terr.
 * 1851 Jan 15
 * Details
 * Mitchell
 * Jan 15 | [[Mitchell
 * 
 * Fayette
 * 1853  18 De
 * Details
 * Monona
 * 18 De | [[Monona
 * 
 * Harrison
 * 1846 Jan 19
 * Details
 * Monroe
 * Jan 19 | [[Monroe
 * 
 * nowrap="nowrap" | renamed from Kishkekosh
 * 1851 Jan 15
 * Details
 * Montgomery
 * Jan 15 | [[Montgomery
 * 
 * Polk
 * 1836 Dec 07
 * Details
 * Muscatine
 * Dec 07 | [[Muscatine
 * 
 * Demoine
 * 1851 Jan 15
 * Details
 * O Brien
 * Jan 15 | [[O'Brien
 * 
 * Fayette
 * 1851 Jan 15
 * Details
 * Osceola
 * Jan 15 | [[Osceola
 * 
 * Fayette
 * 1847 7  18
 * Details
 * Page
 * 7 18 | [[Page
 * 
 * Des Moines
 * 1851 Jan 15
 * Details
 * Palo Alto
 * Jan 15 | [[Palo Alto
 * 
 * Fayette
 * 1851 Jan 15
 * Details
 * Plymouth
 * Jan 15 | [[Plymouth
 * 
 * Buchanan, Fayette
 * 1851 Jan 15
 * Details
 * Pocahontas
 * Jan 15 | [[Pocahontas
 * 
 * Buchanan, Fayette
 * 1846 Jun 05
 * Details
 * Polk
 * Jun 05 | [[Polk
 * 
 * Indian lands
 * 1846 Jun 05
 * Details
 * Pottawattamie
 * Jun 05 | [[Pottawattamie
 * 
 * Pottawattamie Indian lands
 * 1848  18 Ap
 * Details
 * Poweshiek
 * 18 Ap | [[Poweshiek
 * 
 * Keokuk
 * 1854  18 Au
 * Details
 * Ringgold
 * 18 Au | [[Ringgold
 * 
 * Taylor
 * 1851 Jan 15
 * Details
 * Risley
 * Jan 15 | [[Risley
 * 
 * Hamilton
 * 1851 Jan 15
 * Details
 * Sac
 * Jan 15 | [[Sac
 * 
 * Buchanan, Benton
 * 1837 Dec 21
 * Details
 * Scott
 * Dec 21 | [[Scott
 * 
 * old Dubuque
 * 1851 Jan 15
 * Details
 * Shelby
 * Jan 15 | [[Shelby
 * 
 * Keokuk
 * 1851 Jan 15
 * Details
 * Sioux
 * Jan 15 | [[Sioux
 * 
 * Fayette
 * 1846 Jun 05
 * Details
 * Story
 * Jun 05 | [[Story
 * 
 * Benton
 * 1843 Feb 17
 * Details
 * Tama
 * Feb 17 | [[Tama
 * 
 * Benton
 * 1847 7  18
 * Details
 * Taylor
 * 7 18 | [[Taylor
 * 
 * nowrap="nowrap" | Des Moines, Pottawattamie
 * 1851 Jan 15
 * Details
 * Union
 * Jan 15 | [[Union
 * 
 * Des Moines, Pottawattamie
 * 1836 dec 07
 * Details
 * Van Buren
 * dec 07 | [[Van Buren
 * 
 * Demoine
 * 1844 Jun 16
 * Details
 * Wapello
 * Jun 16 | [[Wapello
 * 
 * Indian lands
 * 1851 Jan 15
 * Details
 * Wahkaw
 * Jan 15 | [[Wahkaw
 * 
 * Benton, Buchanan
 * 1846 Jun 05
 * Details
 * Warren
 * Jun 05 | [[Warren
 * 
 * Des Moines, Keokuk
 * 1839 Jan 25
 * Details
 * Washington
 * Jan 25 | [[Washington
 * 
 * renamed from Slaughter
 * 1846 Jun 05
 * Details
 * Wayne
 * Jun 05 | [[Wayne
 * 
 * Des Moines
 * 1853 Jan 12
 * Details
 * Webster
 * Jan 12 | [[Webster
 * 
 * renamed from Risley
 * 1851 Jan 15
 * Details
 * Winnebago
 * Jan 15 | [[Winnebago
 * 
 * Fayette
 * 1847 7  18
 * Details
 * Winneshiek
 * 7 18 | [[Winneshiek
 * 
 * Fayette
 * 1853 Jan 12
 * Details
 * Woodbury
 * Jan 12 | [[Woodbury
 * 
 * renamed from Wahkaw
 * 1851 Jan 15
 * Details
 * Worth
 * Jan 15 | [[Worth
 * 
 * Fayette
 * 1851 Jan 15
 * Details
 * Wright
 * Jan 15 | [[Wright
 * 
 * Buchanan, Fayette
 * 1851 Jan 15
 * Details
 * Yell
 * Jan 15 | [[Yell
 * 
 * Indian lands
 * extinct 1853, absorbed by Webster 1853 by voters
 * Details
 * Taylor
 * 7 18 | [[Taylor
 * 
 * nowrap="nowrap" | Des Moines, Pottawattamie
 * 1851 Jan 15
 * Details
 * Union
 * Jan 15 | [[Union
 * 
 * Des Moines, Pottawattamie
 * 1836 dec 07
 * Details
 * Van Buren
 * dec 07 | [[Van Buren
 * 
 * Demoine
 * 1844 Jun 16
 * Details
 * Wapello
 * Jun 16 | [[Wapello
 * 
 * Indian lands
 * 1851 Jan 15
 * Details
 * Wahkaw
 * Jan 15 | [[Wahkaw
 * 
 * Benton, Buchanan
 * 1846 Jun 05
 * Details
 * Warren
 * Jun 05 | [[Warren
 * 
 * Des Moines, Keokuk
 * 1839 Jan 25
 * Details
 * Washington
 * Jan 25 | [[Washington
 * 
 * renamed from Slaughter
 * 1846 Jun 05
 * Details
 * Wayne
 * Jun 05 | [[Wayne
 * 
 * Des Moines
 * 1853 Jan 12
 * Details
 * Webster
 * Jan 12 | [[Webster
 * 
 * renamed from Risley
 * 1851 Jan 15
 * Details
 * Winnebago
 * Jan 15 | [[Winnebago
 * 
 * Fayette
 * 1847 7  18
 * Details
 * Winneshiek
 * 7 18 | [[Winneshiek
 * 
 * Fayette
 * 1853 Jan 12
 * Details
 * Woodbury
 * Jan 12 | [[Woodbury
 * 
 * renamed from Wahkaw
 * 1851 Jan 15
 * Details
 * Worth
 * Jan 15 | [[Worth
 * 
 * Fayette
 * 1851 Jan 15
 * Details
 * Wright
 * Jan 15 | [[Wright
 * 
 * Buchanan, Fayette
 * 1851 Jan 15
 * Details
 * Yell
 * Jan 15 | [[Yell
 * 
 * Indian lands
 * extinct 1853, absorbed by Webster 1853 by voters
 * 1851 Jan 15
 * Details
 * Wright
 * Jan 15 | [[Wright
 * 
 * Buchanan, Fayette
 * 1851 Jan 15
 * Details
 * Yell
 * Jan 15 | [[Yell
 * 
 * Indian lands
 * extinct 1853, absorbed by Webster 1853 by voters
 * Indian lands
 * extinct 1853, absorbed by Webster 1853 by voters