Adams County (1848 - Present)
Ashland County (1860 - Present)
Bad Ax County (1851 - Present)
Brown County (1818 - Present)
Buffalo County (1853 - Present)
Burnett County (1856 - Present)
Calumet County (1836 - Present)
Chippewa County (1845 - Present)
Clark County (1853 - Present)
Columbia County (1846 - Present)
Crawford County (1818 - Present)
Dallas County (1859 - Present)
Dane County (1836 - Present)
Dodge County (1836 - Present)
Door County (1851 - Present)
Douglas County (1854 - Present)
Dunn County (1854 - Present)
Eau Claire County (1857 - Present)
Florence County (1882 - Present)
Fond Du Lac County (1836 - Present)
Forest County (1885 - Present)
Gates County (1901 - Present)
Grant County (1837 - Present)
Green County (1837 - Present)
Green Lake County (1858 - Present)
Iowa County (1830 - Present)
Iron County (1893 - Present)
Jackson County (1853 - Present)
Jefferson County (1836 - Present)
Juneau County (1857 - Present)
Kenosha County (1850 - Present)
Kewaunee County (1852 - Present)
La Crosse County (1851 - Present)
La Pointe County (1845 - Present)
Lafayette County (1847 - Present)
Lincoln County (1875 - Present)
Manitowoc County (1836 - Present)
Marathon County (1850 - Present)
Marinette County (1879 - Present)
Marquette County (1836 - Present)
Menominee County (1961 - Present)
Milwaukee County (1834 - Present)
Monroe County (1854 - Present)
Montgomery County Proposed (1846 - 1846)
New County (1879 - Present)
Oconto County (1851 - Present)
Oneida County (1887 - Present)
Outagamie County (1851 - Present)
Ozaukee County (1853 - Present)
Pepin County (1858 - Present)
Pierce County (1853 - Present)
Polk County (1853 - Present)
Portage County (1836 - Present)
Price County (1879 - Present)
Racine County (1836 - Present)
Richland County (1842 - Present)
Rock County (1836 - Present)
Sauk County (1840 - Present)
Sawyer County (1883 - Present)
Shawano County (1853 - Present)
Sheboygan County (1836 - Present)
St Croix County (1840 - Present)
Taylor County (1875 - Present)
Trempealeau County (1854 - Present)
Tuskola County Proposed (1850 - 1850)
Unnamed County Proposed (1846 - 1846)
Vilas County (1893 - Present)
Walworth County (1836 - Present)
Washburn County (1883 - Present)
Washington County (1836 - Present)
Waukesha County (1846 - Present)
Waupaca County (1851 - Present)
Waushara County (1851 - Present)
Winnebago County (1840 - Present)
Wood County (1856 - Present)