Wisconsin County Creation Dates and Parent Counties
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:
- Kellogg, Louise Phelps. "Organization, Boundaries, and Names of Wisconsin Counties," in Proceedings of the State Historical Society of Wisconsin. 57 (1909), 184-231.
- Newberry Library. Wisconsin Atlas of Historical County Boundaries - An interactive atlas of county boundary changes.
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Calumet | 07 Dec 1836 | Brown | charter repealed 1840, restablished 1842 |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 |