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United States > Wisconsin > Wisconsin County Creation Dates and Parent Counties

The following is a list of the counties that have existed in Wisconsin from the time it gained territorial status (20 April 1836) up to the present. It excludes those counties that were created in the area that became Iowa Territory on 4 July 1838.

Before becoming a territory the area that now makes up Wisconsin belonged to the following jurisdictions:

  • Northwest Territory - 13 July 1787 to 7 May 1800
  • Indiana Territory - 7 May 1800 to 1 March 1809
  • Illinois Territory - 1 March 1809 to 18 April 1818
  • Michigan Territory - 18 April 1818 to 20 April 1836

For a detailed look at the formation and boundary changes of Wisconsin Counties between 1818 and 1909 see:

County Date Created Parent County Notes
Adams 11 Mar 1848 Portage Juneau 1856
Ashland 27 Mar 1860 La Pointe (now Bayfield)
Iron 1893, Sawyer 1883
Bad Ax 01 Mar 1851 Crawford renamed Vernon 1862
Barron 04 Mar 1869 renamed from Dallas
none
Bayfield 12 Apr 1866 renamed from La Pointe none
Brown 26 Oct 1818 Michigan Territory
Door 1851, Outagamie 1851
Buffalo 06 Jul 1853 Trempealeau none
Burnett
31 Mar 1856 Polk Washburn 1883
Calumet 07 Dec 1836 Brown charter repealed 1840, restablished 1842
Chippewa 03 Feb 1853 Crawford Dunn 1854, Eau Claire 1856, Price 1879, Rusk 1901, Sawyer 1883, Taylor 1875
Clark 06 Jul 1853 Jackson Taylor 1875
Columbia 03 Feb 1846 Portage none
Crawford 26 Oct 1818 Michigan Territory
Chippewa 1845, Clark 1853, Bax Ax 1851, Trempealeau 1854
Dallas 19 Mar 1859 Polk renamed Barron 1869
Dane 07 Dec 1836 Crawford, Iowa, Milwaukee none
Dodge 07 Dec 1836 Brown, Milwaukee none
Door 11 Feb 1851 Brown none
Douglas 09 Feb 1854 La Pointe none
Dunn 03 Feb 1854 Chippewa Pepin 1858
Eau Claire 06 Oct 1856 Chippewa none
Florence 18 Mar 1882 Marinette, Oconto none
Fond du Lac 07 Dec 1836 Brown none
Forest 11 Apr 1885 Langlade none
Gates 15 May 1901 Chippewa renamed Rusk 1905
Grant 08 Dec 1836 Iowa none
Green 08 Dec 1836 Iowa none
Green Lake 05 Mar 1858 Marquette none
Iowa 09 Oct 1829 Crawford Lafayette 1846, Richland 1842
Iron 01 Mar 1893 Ashland none
Jackson 11 Feb 1853 La Crosse none
Jefferson 07 Dec 1836 Milwaukee none
Juneau 13 Oct 1856 Adams none
Kenosha 30 Jan 1850 Racine none
Kewaunee 16 Apr 1852 Door none
La Crosse 01 Mar 1851 Crawford Jackson 1853, Monroe 1854, Trempealeau 1854
La Pointe 19 Feb 1845 Saint Croix renamed Bayfield 1866
Lafayette 31 Jan 1846 Iowa none
Langlade 19 Feb 1880 renamed from New
Forest 1885
Lincoln 04 Mar 1874 Marathon New 1879, Oneida 1885, Price 1879, Taylor 1875
Manitowoc 07 Dec 1836 Brown Kenaunee 1852
Marathon 09 Feb 1850 Portage Lincoln 1874, Taylor 1875
Marinette 27 Feb 1879 Oconto Florence 1882
Marquette 07 Dec 1836 Brown Green Lake 1858, Waushara 1851
Menominee 03 Jul 1959 Menominee Indian Reservation
Reservation terminated 1961, restored 1973, co-existence.
Milwaukee 06 Sep 1834 Michigan Territory
Jefferson 1836, Ozaukee 1853, Waukesha 1846
Monroe 21 Mar 1854 La Crosse none
New 27 Feb 1879 Oconto renamed Langlade 1880
Oconto 06 Feb 1851 Brown New 1879, Marinette 1879, Shawano 1853
Oneida 11 Apr 1885 Lincoln Iron 1893, Vilas 1893
Outagamie 17 Feb 1851 Brown, Winnebago none
Ozaukee 7 Mar 1853 Washington none
Pepin 25 Feb 1858 Dunn none
Pierce 14 Mar 1853 Saint Croix none
Polk 14 Mar 1853 Saint Croix Dallas 1859, Burnett 1856
Portage 07 Dec 1836 Brown, Crawford, Iowa, Milwaukee Adams 1848, Columbia 1846, Wood 1856, Marathon 1850
Price 26 Feb 1879 Chippewa, Lincoln none
Racine 07 Dec 1836 Milwaukee Kenosha 1850
Richland 18 Feb 1842 Iowa Bad Ax 1851
Rock 07 Dec 1836 Milwaukee none
Rusk 19 Jun 1905 renamed from Gates none
St. Croix 09 Jan 1840 Crawford Pierce 1853, Polk 1853
Sauk 11 Jan 1840 Crawford, Dane, Portage none
Sawyer 10 Mar 1883 Ashland, Chippewa none
Shawano 16 Feb 1853 Oconto none
Sheboygan 07 Dec 1836 Brown none
Taylor 04 Mar 1875 Chippewa, Clark, Lincoln, Marathon none
Trempealeau 27 Jan 1854 Buffalo, Chippewa, Jackson, La Crosse none
Vernon 22 Mar 1862 renamed from Bad Ax none
Vilas 12 Apr 1893 Oneida none
Walworth 07 Dec 1836 Milwaukee none
Washburn 27 Mar 1883 Burnett none
Washington 07 Dec 1836 Brown, Milwaukee none
Waukesha 31 Jan 1846 Milwaukee none
Waupaca 17 Feb 1851 Brown, Winnebago none
Waushara 15 Feb 1851 Marquette none
Winnebago 6 Jan 1840 Brown none
Wood 29 Mar 1856 Portage none

 

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