Difference between revisions of "Iowa County Creation Dates and Parent Counties"

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(New page: {| cellspacing="1" cellpadding="1" width="100%" border="1" |- | '''County'''<br> | '''Year<br>Created''' | '''Parent County'''<br> | '''Year Split and Child County'''<br> |- |   | ...)
 
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{| cellspacing="1" cellpadding="1" width="100%" border="1"
+
{| border="1"
 
|-
 
|-
| '''County'''<br>
+
| 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'''  
| '''Year<br>Created'''  
+
| 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'''  
| '''Parent County'''<br>
+
| 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'''  
| '''Year Split and Child County'''<br>
+
| 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;" | '''Progeny County'''
 
|-
 
|-
| &nbsp;
+
| [[Adair County, Iowa|Adair]]
|  
+
| 15 Jan 1851
|  
+
| Cass
|  
+
| none
 
|-
 
|-
|  
+
| [[Adams County, Iowa|Adams]]
|  
+
| 15 Jan 1851
|  
+
| Taylor
|  
+
| none
 
|-
 
|-
|  
+
| [[Allamakee County, Iowa|Allamakee]]
|  
+
| 1847
|  
+
| Clayton
|  
+
| none
 
|-
 
|-
|  
+
| [[Appanoose County, Iowa|Appanoose]]
|  
+
| 17 Feb 1843
|  
+
| Davis
|  
+
| Decatur 1846
 
|-
 
|-
|  
+
| [[Audubon County, Iowa|Audubon]]
|  
+
| nowrap="nowrap" | 15 Jan 1851
|  
+
| Cass, Black Hawk
|  
+
| none
 
|-
 
|-
|  
+
| Bancroft
|  
+
| 15 Jan 1851
|  
+
| Kossuth
|  
+
| declared unconstitutional 1871
 
|-
 
|-
|  
+
| Belknap
|  
+
| 1874
|  
+
| Pottawattamie
|  
+
| rejected by voters 1876
 
|-
 
|-
|  
+
| [[Benton County, Minnesota|Benton]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| Ida 1851, Kossuth 1851, Marshall 1846, Sac 1851, Story 1846, Tama 1843
 
|-
 
|-
|  
+
| [[Black Hawk County, Iowa|Black Hawk]]
|  
+
| 05 Jun 1846
|  
+
| Delaware
|  
+
| Audubon 1851, Butler 1851, Grundy 1851, Hardin 1851
 
|-
 
|-
|  
+
| [[Boone County, Iowa|Boone]]
|  
+
| 05 Jun 1846
|  
+
| Polk
|  
+
| none
 
|-
 
|-
|  
+
| [[Bremer County, Iowa|Bremer]]
|  
+
| 15 Jan 1851
|  
+
| nowrap="nowrap" | Winnebago Indian reserve
|  
+
| none
 
|-
 
|-
|  
+
| [[Buchanan County, Iowa|Buchanan]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| Butler 1851, Pocahontas 1851, Ida 1851, Plymouth 1851, Sac 1851, Wright 1851
 
|-
 
|-
|  
+
| Buncombe
|  
+
| 15 Jan 1851
|  
+
| Woodbury, Webster
|  
+
| renamed Lyon 1862
 
|-
 
|-
|  
+
| [[Buena Vista County, Iowa|Buena Vista]]
|  
+
| 15 Jan 1851
|  
+
| Sac, Clay
|  
+
| none
 
|-
 
|-
|  
+
| [[Butler County, Iowa|Butler]]
|  
+
| 15 Jan 1851
|  
+
| Buchanan, Black Hawk
|  
+
| none
 
|-
 
|-
|  
+
| [[Calhoun County, Iowa|Calhoun]]
|  
+
| 22 Jan 1853
|  
+
| renamed from Fox
|  
+
| none
 
|-
 
|-
|  
+
| [[Carroll County, Iowa|Carroll]]
|  
+
| 15 Jan 1851
|  
+
| Gutherie
|  
+
| none
 
|-
 
|-
|  
+
| [[Cass County, Iowa|Cass]]
|  
+
| 15 Jan 1851
|  
+
| Pottawattamie
|  
+
| Adair 1851, Audubon 1851
 
|-
 
|-
|  
+
| [[Cedar County, Iowa|Cedar]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| none
 
|-
 
|-
|  
+
| [[Cerro Gordo County, Iowa|Cerro Gordo]]
|  
+
| 15 Jan 1851
|  
+
| Floyd
|  
+
| none
 
|-
 
|-
|  
+
| [[Cherokee County, Iowa|Cherokee]]
|  
+
| 15 Jan 1851
|  
+
| Crawford
|  
+
| none
 
|-
 
|-
|  
+
| [[Chickasaw County, Iowa|Chickasaw]]
|  
+
| 15 Jan 1851
|  
+
| Fayette
|  
+
| Franklin 1851
 
|-
 
|-
|  
+
| [[Clarke County, Iowa|Clarke]]
|  
+
| 15 Jan 1851
|  
+
| Lucas
|  
+
| none
 
|-
 
|-
|  
+
| [[Clay County, Iowa|Clay]]
|  
+
| 15 Jan 1851
|  
+
| Indian lands
|  
+
| Buena Vista 1851
 
|-
 
|-
|  
+
| [[Clayton County, Iowa|Clayton]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| Allamakee 1847, Fayette 1837
 
|-
 
|-
|  
+
| [[Clinton County, Iowa|Clinton]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| none
 
|-
 
|-
|  
+
| [[Cook County, Iowa|Cook]]
|  
+
| 07 Dec 1836
|  
+
| Demoine
|  
+
| extinct 1837
 
|-
 
|-
|  
+
| [[Crawford County, Iowa|Crawford]]
|  
+
| 15 Jan 1851
|  
+
| Shelby
|  
+
| Cherokee 1851
 
|-
 
|-
|  
+
| Crocker
|  
+
| 1870
|  
+
| Bancroft, Kossuth
|  
+
| declared unconstitutional 1871
 
|-
 
|-
|  
+
| [[Dallas County, Iowa|Dallas]]
|  
+
| 17 Jan 1846
|  
+
| Polk
|  
+
| Greene 1851
 
|-
 
|-
|  
+
| [[Davis County, Iowa|Davis]]
|  
+
| 17 Feb 1843
|  
+
| Van Buren
|  
+
| Appanoose 1843
 
|-
 
|-
|  
+
| [[Decatur County, Iowa|Decatur]]
|  
+
| 17 Jan 1846
|  
+
| Appanoose
|  
+
| none
 
|-
 
|-
|  
+
| [[Delaware County, Iowa|Delaware]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| Black Hawk 1843
 
|-
 
|-
|  
+
| Demoine
|  
+
| 01 Jun 1833
|  
+
| Michigan Territory
|  
+
| Des Moines 1836, Lee 1836, Henry 1836, Van Buren 1836, Louisa 1836, Cook 1836, Muscatine 1836
 
|-
 
|-
|  
+
| [[Des Moines County, Iowa|Des Moines]]
|  
+
| 07 Dec 1836
|  
+
| Demoine
|  
+
| Story 1846, Taylor 1847, Union 1851, Madison 1844, Mahaska 1843, Marion 1845, Page 1847, Warren 1846, Wayne 1846
 
|-
 
|-
|  
+
| [[Dickinson County, Iowa|Dickinson]]
|  
+
| 15 Jan 1851
|  
+
| Kossuth
|  
+
| Emmet 1851
 
|-
 
|-
|  
+
| Dubuque (old)
|  
+
| 06 Sep 1834
|  
+
| Michigan Territory
|  
+
| Dubuque 1837, Clayton 1837, Jackson 1837, Benton 1837, Linn 1837, Jones 1837, Clinton 1837, Johnson 1837, Scott 1837, Delaware 1837, Buchanan 1837, Cedar 1837, Fayette 1837
 
|-
 
|-
|  
+
| [[Dubuque County, Iowa|Dubuque]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| none
 
|-
 
|-
|  
+
| [[Emmet County, Iowa|Emmet]]
|  
+
| 15 Jan 1851
|  
+
| Kossuth, Dickinson
|  
+
| none
 
|-
 
|-
|  
+
| [[Fayette County, Iowa|Fayette]]
|  
+
| 21 Dec 1837
|  
+
| old Dubuque
|  
+
| Story 1846, Sioux 1851, Palo Alto 1851, Plymouth 1851, Tama 1843, Chickasaw 1851, Howard 1851, Osceola 1851, Pocahontas 1851, Mitchell 1851, O’Brien 1851, Winnebago 1847, Wright 1851, Winneshiek 1847, Worth 1851
 
|-
 
|-
|  
+
| [[Floyd County, Iowa|Floyd]]
|  
+
| 15 Jan 1851
|  
+
| Chickasaw
|  
+
| Cerro Gordo 1851
 
|-
 
|-
|  
+
| Fox
|  
+
| 15 Jan 1851
|  
+
| Pottawattamie
|  
+
| renamed Calhoun 1853
 
|-
 
|-
|  
+
| [[Franklin County, Iowa|Franklin]]
|  
+
| 15 Jan 1851
|  
+
| Chickasaw
|  
+
| none
 
|-
 
|-
|  
+
| [[Fremont County, Iowa|Fremont]]
|  
+
| 1847
|  
+
| Pottawattamie
|  
+
| none
 
|-
 
|-
|  
+
| [[Greene County, Iowa|Greene]]
|  
+
| 15 Jan 1851
|  
+
| Dallas
|  
+
| none
 
|-
 
|-
|  
+
| Grimes
|  
+
| 1876
|  
+
| Pottawattamie
|  
+
| rejected by voters 1876
 
|-
 
|-
|  
+
| [[Grundy County, Iowa|Grundy]]
|  
+
| 15 Jan 1851
|  
+
| Black Hawk
|  
+
| none
 
|-
 
|-
|  
+
| [[Guthrie County, Iowa|Guthrie]]
|  
+
| 15 Jan 1851
|  
+
| Jackson, Iowa
|  
+
| Carroll 1851
 
|-
 
|-
|  
+
| [[Hamilton County, Iowa|Hamilton]]
|  
+
| 1856
|  
+
| Webster
|  
+
| none
 
|-
 
|-
|  
+
| [[Hancock County, Iowa|Hancock]]
|  
+
| 15 Jan 1851
|  
+
| Wright
|  
+
| none
 +
|-
 +
| [[Hardin County, Iowa|Hardin]]
 +
| 15 Jan 1851
 +
| Black Hawk
 +
| none
 +
|-
 +
| [[Harrison County, Iowa|Harrison]]
 +
| 15 Jan 1851
 +
| Pottawattamie
 +
| none
 +
|-
 +
| [[Henry County, Iowa|Henry]]
 +
| 07 Dec 1836
 +
| Demoine
 +
| Washington 1837
 +
|-
 +
| [[Howard County, Iowa|Howard]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| Humbolt (old)
 +
| 15 Jan 1851
 +
| Fayette
 +
| extinct
 +
|-
 +
| [[Humboldt County, Iowa|Humboldt]]
 +
| 26 Feb 1857
 +
| Webster
 +
| none
 +
|-
 +
| [[Ida County, Iowa|Ida]]
 +
| 15 Jan 1851
 +
| Buchanan, Benton
 +
| none
 +
|-
 +
| [[Iowa County, Iowa|Iowa]]
 +
| 17 Feb 1843
 +
| Washington
 +
| Guthrie 1851
 +
|-
 +
| [[Jackson County, Iowa|Jackson]]
 +
| 21 Dec 1837
 +
| old Dubuque
 +
| Guthrie 1851
 +
|-
 +
| [[Jasper County, Iowa|Jasper]]
 +
| 17 Jan 1846
 +
| Mahaska
 +
| none
 +
|-
 +
| [[Jefferson County, Iowa|Jefferson]]
 +
| 04 Nov 1839
 +
| Indian lands
 +
| none
 +
|-
 +
| [[Johnson County, Iowa|Johnson]]
 +
| 21 Dec 1837
 +
| old Dubuque
 +
| none
 +
|-
 +
| [[Jones County, Iowa|Jones]]
 +
| 21 Dec 1837
 +
| old Dubuque
 +
| none
 +
|-
 +
| Keokuk (old)
 +
| 21 Oct 1837
 +
| Sac and Fox Indian lands
 +
| Keokuk 1843, Mahaska 1843
 +
|-
 +
| [[Keokuk County, Iowa|Keokuk]]
 +
| 17 Feb 1837
 +
| old Keokuk
 +
| Poweshiek 1848, Marion 1845, Jasper 1846, Shelby 1846, Story 1846, Warren 1846
 +
|-
 +
| Kishkekosh
 +
| 17 Feb 1843
 +
| Wapello
 +
| renamed Monroe 1846
 +
|-
 +
| [[Kossuth County, Iowa|Kossuth]]
 +
| 15 Jan 1851
 +
| Fayette, Bancroft
 +
| Dickinson 1851, Emmet 1851
 +
|-
 +
| [[Lee County, Iowa|Lee]]
 +
| 07 Dec 1836
 +
| Demoine
 +
| none
 +
|-
 +
| [[Linn County, Iowa|Linn]]
 +
| 21 Dec 1837
 +
| old Dubuque
 +
| none
 +
|-
 +
| [[Louisa County, Iowa|Louisa]]
 +
| 07 Dec 1836
 +
| Demoine
 +
| Washington 1837
 +
|-
 +
| [[Lucas County, Iowa|Lucas]]
 +
| 05 Jun 1846
 +
| Monroe
 +
| Clark 1851
 +
|-
 +
| [[Lyon County, Iowa|Lyon]]
 +
| 11 Sep 1862
 +
| renamed from Buncombe
 +
| none
 +
|-
 +
| [[Madison County, Iowa|Madison]]
 +
| 16 Jun 1844
 +
| Des Moines
 +
| none
 +
|-
 +
| [[Mahaska County, Iowa|Mahaska]]
 +
| 17 Feb 1843
 +
| Des Moines, Keokuk
 +
| Jasper 1846
 +
|-
 +
| [[Marion County, Iowa|Marion]]
 +
| nowrap="nowrap" | 05 May 1845
 +
| Des Moines, Keokuk
 +
| none
 +
|-
 +
| [[Marshall County, Iowa|Marshall]]
 +
| 05 Jun 1846
 +
| Benton
 +
| none
 +
|-
 +
| [[Mills County, Iowa|Mills]]
 +
| 15 Jan 1851
 +
| Pottawattamie
 +
| none
 +
|-
 +
| [[Mitchell County, Iowa|Mitchell]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| [[Monona County, Iowa|Monona]]
 +
| Dec 1853
 +
| Harrison
 +
| none
 +
|-
 +
| [[Monroe County, Iowa|Monroe]]
 +
| 19 Jan 1846
 +
| nowrap="nowrap" | renamed from Kishkekosh
 +
| Lucas 1846
 +
|-
 +
| [[Montgomery County, Iowa|Montgomery]]
 +
| 15 Jan 1851
 +
| Polk
 +
| none
 +
|-
 +
| [[Muscatine County, Iowa|Muscatine]]
 +
| 07 Dec 1836
 +
| Demoine
 +
| Washington 1837
 +
|-
 +
| [[O'Brien County, Iowa|O Brien]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| [[Osceola County, Iowa|Osceola]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| [[Page County, Iowa|Page]]
 +
| 1847
 +
| Des Moines
 +
| none
 +
|-
 +
| [[Palo Alto County, Iowa|Palo Alto]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| [[Plymouth County, Iowa|Plymouth]]
 +
| 15 Jan 1851
 +
| Buchanan, Fayette
 +
| none
 +
|-
 +
| [[Pocahontas County, Iowa|Pocahontas]]
 +
| 15 Jan 1851
 +
| Buchanan, Fayette
 +
| none
 +
|-
 +
| [[Polk County, Iowa|Polk]]
 +
| 05 Jun 1846
 +
| Indian lands
 +
| Boone 1846, Montgomery 1851, Dallas 1846
 +
|-
 +
| [[Pottawattamie County, Iowa|Pottawattamie]]
 +
| 05 Jun 1846
 +
| Pottawattamie Indian lands
 +
| Cass 1851, Fremont 1847, Harrison 1851, Jasper 1841, Taylor 1847, Union 1851
 +
|-
 +
| [[Poweshiek County, Iowa|Poweshiek]]
 +
| Apr 1848
 +
| Keokuk
 +
| none
 +
|-
 +
| [[Ringgold County, Iowa|Ringgold]]
 +
| Aug 1854
 +
| Taylor
 +
| none
 +
|-
 +
| [[Risley County, Iowa|Risley]]
 +
| 15 Jan 1851
 +
| Hamilton
 +
| renamed 1853
 +
|-
 +
| [[Sac County, Iowa|Sac]]
 +
| 15 Jan 1851
 +
| Buchanan, Benton
 +
| Buena Vista 1851
 +
|-
 +
| [[Scott County, Iowa|Scott]]
 +
| 21 Dec 1837
 +
| old Dubuque
 +
| none
 +
|-
 +
| [[Shelby County, Iowa|Shelby]]
 +
| 15 Jan 1851
 +
| Keokuk
 +
| Crawford 1851
 +
|-
 +
| [[Sioux County, Iowa|Sioux]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| Slaughter
 +
| 21 Dec 1837
 +
| Louisa, Muscatine, Henry
 +
| renamed Washington 1839
 +
|-
 +
| [[Story County, Iowa|Story]]
 +
| 05 Jun 1846
 +
| Benton
 +
| none
 +
|-
 +
| [[Tama County, Iowa|Tama]]
 +
| 17 Feb 1843
 +
| Benton
 +
| none
 +
|-
 +
| [[Taylor County, Iowa|Taylor]]
 +
| 1847
 +
| nowrap="nowrap" | Des Moines, Pottawattamie
 +
| Adams 1851, Taylor 1847
 +
|-
 +
| [[Union County, Iowa|Union]]
 +
| 15 Jan 1851
 +
| Des Moines, Pottawattamie
 +
| none
 +
|-
 +
| [[Van Buren County, Iowa|Van Buren]]
 +
| 07 dec 1836
 +
| Demoine
 +
| Davis 1843
 +
|-
 +
| [[Wapello County, Iowa|Wapello]]
 +
| 16 Jun 1844
 +
| Indian lands
 +
| none
 +
|-
 +
| [[Wahkaw County, Iowa|Wahkaw]]
 +
| 15 Jan 1851
 +
| Benton, Buchanan
 +
| renamed Woodbury 1853
 +
|-
 +
| [[Warren County, Iowa|Warren]]
 +
| 05 Jun 1846
 +
| Des Moines, Keokuk
 +
| none
 +
|-
 +
| [[Washington County, Iowa|Washington]]
 +
| 25 Jan 1839
 +
| renamed from Slaughter
 +
| none
 +
|-
 +
| [[Wayne County, Iowa|Wayne]]
 +
| 05 Jun 1846
 +
| Des Moines
 +
| none
 +
|-
 +
| [[Webster County, Iowa|Webster]]
 +
| 12 Jan 1853
 +
| renamed from Risley
 +
| Hamilton 1856, Humbolt 1857, Buncombe 1851
 +
|-
 +
| [[Winnebago County, Iowa|Winnebago]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| [[Winneshiek County, Iowa|Winneshiek]]
 +
| 1847
 +
| Fayette
 +
| none
 +
|-
 +
| [[Woodbury County, Iowa|Woodbury]]
 +
| 12 Jan 1853
 +
| renamed from Wahkaw
 +
| none
 +
|-
 +
| [[Worth County, Iowa|Worth]]
 +
| 15 Jan 1851
 +
| Fayette
 +
| none
 +
|-
 +
| [[Wright County, Iowa|Wright]]
 +
| 15 Jan 1851
 +
| Buchanan, Fayette
 +
| Hancock 1851
 +
|-
 +
| [[Yell County, Iowa|Yell]]
 +
| 15 Jan 1851
 +
| Indian lands
 +
| extinct 1853, absorbed by Webster 1853 by voters
 
|}
 
|}
 +
 +
[[Category:United_States_County_Creations]]

Revision as of 05:36, 15 March 2009

Name of County Date Formed Parent County Progeny County
Adair 15 Jan 1851 Cass none
Adams 15 Jan 1851 Taylor none
Allamakee 1847 Clayton none
Appanoose 17 Feb 1843 Davis Decatur 1846
Audubon 15 Jan 1851 Cass, Black Hawk none
Bancroft 15 Jan 1851 Kossuth declared unconstitutional 1871
Belknap 1874 Pottawattamie rejected by voters 1876
Benton 21 Dec 1837 old Dubuque Ida 1851, Kossuth 1851, Marshall 1846, Sac 1851, Story 1846, Tama 1843
Black Hawk 05 Jun 1846 Delaware Audubon 1851, Butler 1851, Grundy 1851, Hardin 1851
Boone 05 Jun 1846 Polk none
Bremer 15 Jan 1851 Winnebago Indian reserve none
Buchanan 21 Dec 1837 old Dubuque Butler 1851, Pocahontas 1851, Ida 1851, Plymouth 1851, Sac 1851, Wright 1851
Buncombe 15 Jan 1851 Woodbury, Webster renamed Lyon 1862
Buena Vista 15 Jan 1851 Sac, Clay none
Butler 15 Jan 1851 Buchanan, Black Hawk none
Calhoun 22 Jan 1853 renamed from Fox none
Carroll 15 Jan 1851 Gutherie none
Cass 15 Jan 1851 Pottawattamie Adair 1851, Audubon 1851
Cedar 21 Dec 1837 old Dubuque none
Cerro Gordo 15 Jan 1851 Floyd none
Cherokee 15 Jan 1851 Crawford none
Chickasaw 15 Jan 1851 Fayette Franklin 1851
Clarke 15 Jan 1851 Lucas none
Clay 15 Jan 1851 Indian lands Buena Vista 1851
Clayton 21 Dec 1837 old Dubuque Allamakee 1847, Fayette 1837
Clinton 21 Dec 1837 old Dubuque none
Cook 07 Dec 1836 Demoine extinct 1837
Crawford 15 Jan 1851 Shelby Cherokee 1851
Crocker 1870 Bancroft, Kossuth declared unconstitutional 1871
Dallas 17 Jan 1846 Polk Greene 1851
Davis 17 Feb 1843 Van Buren Appanoose 1843
Decatur 17 Jan 1846 Appanoose none
Delaware 21 Dec 1837 old Dubuque Black Hawk 1843
Demoine 01 Jun 1833 Michigan Territory Des Moines 1836, Lee 1836, Henry 1836, Van Buren 1836, Louisa 1836, Cook 1836, Muscatine 1836
Des Moines 07 Dec 1836 Demoine Story 1846, Taylor 1847, Union 1851, Madison 1844, Mahaska 1843, Marion 1845, Page 1847, Warren 1846, Wayne 1846
Dickinson 15 Jan 1851 Kossuth Emmet 1851
Dubuque (old) 06 Sep 1834 Michigan Territory Dubuque 1837, Clayton 1837, Jackson 1837, Benton 1837, Linn 1837, Jones 1837, Clinton 1837, Johnson 1837, Scott 1837, Delaware 1837, Buchanan 1837, Cedar 1837, Fayette 1837
Dubuque 21 Dec 1837 old Dubuque none
Emmet 15 Jan 1851 Kossuth, Dickinson none
Fayette 21 Dec 1837 old Dubuque Story 1846, Sioux 1851, Palo Alto 1851, Plymouth 1851, Tama 1843, Chickasaw 1851, Howard 1851, Osceola 1851, Pocahontas 1851, Mitchell 1851, O’Brien 1851, Winnebago 1847, Wright 1851, Winneshiek 1847, Worth 1851
Floyd 15 Jan 1851 Chickasaw Cerro Gordo 1851
Fox 15 Jan 1851 Pottawattamie renamed Calhoun 1853
Franklin 15 Jan 1851 Chickasaw none
Fremont 1847 Pottawattamie none
Greene 15 Jan 1851 Dallas none
Grimes 1876 Pottawattamie rejected by voters 1876
Grundy 15 Jan 1851 Black Hawk none
Guthrie 15 Jan 1851 Jackson, Iowa Carroll 1851
Hamilton 1856 Webster none
Hancock 15 Jan 1851 Wright none
Hardin 15 Jan 1851 Black Hawk none
Harrison 15 Jan 1851 Pottawattamie none
Henry 07 Dec 1836 Demoine Washington 1837
Howard 15 Jan 1851 Fayette none
Humbolt (old) 15 Jan 1851 Fayette extinct
Humboldt 26 Feb 1857 Webster none
Ida 15 Jan 1851 Buchanan, Benton none
Iowa 17 Feb 1843 Washington Guthrie 1851
Jackson 21 Dec 1837 old Dubuque Guthrie 1851
Jasper 17 Jan 1846 Mahaska none
Jefferson 04 Nov 1839 Indian lands none
Johnson 21 Dec 1837 old Dubuque none
Jones 21 Dec 1837 old Dubuque none
Keokuk (old) 21 Oct 1837 Sac and Fox Indian lands Keokuk 1843, Mahaska 1843
Keokuk 17 Feb 1837 old Keokuk Poweshiek 1848, Marion 1845, Jasper 1846, Shelby 1846, Story 1846, Warren 1846
Kishkekosh 17 Feb 1843 Wapello renamed Monroe 1846
Kossuth 15 Jan 1851 Fayette, Bancroft Dickinson 1851, Emmet 1851
Lee 07 Dec 1836 Demoine none
Linn 21 Dec 1837 old Dubuque none
Louisa 07 Dec 1836 Demoine Washington 1837
Lucas 05 Jun 1846 Monroe Clark 1851
Lyon 11 Sep 1862 renamed from Buncombe none
Madison 16 Jun 1844 Des Moines none
Mahaska 17 Feb 1843 Des Moines, Keokuk Jasper 1846
Marion 05 May 1845 Des Moines, Keokuk none
Marshall 05 Jun 1846 Benton none
Mills 15 Jan 1851 Pottawattamie none
Mitchell 15 Jan 1851 Fayette none
Monona Dec 1853 Harrison none
Monroe 19 Jan 1846 renamed from Kishkekosh Lucas 1846
Montgomery 15 Jan 1851 Polk none
Muscatine 07 Dec 1836 Demoine Washington 1837
O Brien 15 Jan 1851 Fayette none
Osceola 15 Jan 1851 Fayette none
Page 1847 Des Moines none
Palo Alto 15 Jan 1851 Fayette none
Plymouth 15 Jan 1851 Buchanan, Fayette none
Pocahontas 15 Jan 1851 Buchanan, Fayette none
Polk 05 Jun 1846 Indian lands Boone 1846, Montgomery 1851, Dallas 1846
Pottawattamie 05 Jun 1846 Pottawattamie Indian lands Cass 1851, Fremont 1847, Harrison 1851, Jasper 1841, Taylor 1847, Union 1851
Poweshiek Apr 1848 Keokuk none
Ringgold Aug 1854 Taylor none
Risley 15 Jan 1851 Hamilton renamed 1853
Sac 15 Jan 1851 Buchanan, Benton Buena Vista 1851
Scott 21 Dec 1837 old Dubuque none
Shelby 15 Jan 1851 Keokuk Crawford 1851
Sioux 15 Jan 1851 Fayette none
Slaughter 21 Dec 1837 Louisa, Muscatine, Henry renamed Washington 1839
Story 05 Jun 1846 Benton none
Tama 17 Feb 1843 Benton none
Taylor 1847 Des Moines, Pottawattamie Adams 1851, Taylor 1847
Union 15 Jan 1851 Des Moines, Pottawattamie none
Van Buren 07 dec 1836 Demoine Davis 1843
Wapello 16 Jun 1844 Indian lands none
Wahkaw 15 Jan 1851 Benton, Buchanan renamed Woodbury 1853
Warren 05 Jun 1846 Des Moines, Keokuk none
Washington 25 Jan 1839 renamed from Slaughter none
Wayne 05 Jun 1846 Des Moines none
Webster 12 Jan 1853 renamed from Risley Hamilton 1856, Humbolt 1857, Buncombe 1851
Winnebago 15 Jan 1851 Fayette none
Winneshiek 1847 Fayette none
Woodbury 12 Jan 1853 renamed from Wahkaw none
Worth 15 Jan 1851 Fayette none
Wright 15 Jan 1851 Buchanan, Fayette Hancock 1851
Yell 15 Jan 1851 Indian lands extinct 1853, absorbed by Webster 1853 by voters