Editing List of counties in Michigan (section)

==Defunct counties and county precursors==
This listing includes only counties or county precursors created by the Territory of Michigan or the State of Michigan. It excludes counties that existed in the Territory of Michigan or the modern boundaries of the State of Michigan but were created by any other entity (another state, a territorial government, the federal government, etc.) before the creation of the Territory of Michigan.<ref>[https://publications.newberry.org/ahcbp/documents/MI_Individual_County_Chronologies.htm Michigan: Individual County Chronologies], John H. Long, Editor, 2007, The Newberry Library, accessed February 21, 2021 {{Webarchive|url=https://web.archive.org/web/20180515071234/http://publications.newberry.org/ahcbp/documents/MI_Individual_County_Chronologies.htm |date=May 15, 2018 }}</ref>
# [[Brown County, Wisconsin|Brown County]], formed on December 3, 1818, from unorganized territory when [[Michigan Territory]] was expanded to include area west of [[Lake Michigan]] upon formation of the state of [[Illinois]]. Transferred to [[Wisconsin Territory]] on July 3, 1836, and continues as [[Brown County, Wisconsin]].
# [[Crawford County, Wisconsin|Crawford County]], formed on December 3, 1818, from unorganized territory when [[Michigan Territory]] was expanded to include area west of [[Lake Michigan]] upon formation of the state of [[Illinois]]. Transferred to Wisconsin Territory on July 3, 1836, and continues as [[Crawford County, Wisconsin]].
# [[Des Moines County, Iowa|Des Moines County]], formed on October 1, 1834, from unorganized territory. Transferred to Wisconsin Territory on July 3, 1836, and continues as [[Des Moines County, Iowa]].
# [[Detroit District, Michigan|Detroit District]], formed on July 3, 1805, as a county precursor by Territorial Governor [[Lewis Cass]] to carry out the Territory's judicial and administrative functions. Superseded by counties on October 2, 1818, as proclaimed by [[William Woodbridge]], Secretary of Michigan Territory.
# [[Dubuque County, Iowa|Dubuque County]], formed on October 1, 1834, from unorganized territory. Transferred to Wisconsin Territory on July 3, 1836, and continues as [[Dubuque County, Iowa]].
# [[Erie District, Michigan|Erie District]], formed on July 3, 1805, as a county precursor by Territorial Governor [[William Hull]] to carry out the Territory's judicial and administrative functions. Included parts of modern-day [[Indiana]] and the [[Toledo Strip]]. Although the Erie District was officially superseded by counties by proclamation of Michigan Territorial Secretary [[William Woodbridge]] on October 2, 1818, the area of the district had actually been lost to the State of Indiana when it was created on December 11, 1816.
# [[Huron District]] formed on July 3, 1805, as a county precursor by Territorial Governor [[William Hull]] to carry out the Territory's judicial and administrative functions. Superseded by counties on October 2, 1818, as proclaimed by [[William Woodbridge]], Secretary of Michigan Territory.
# [[Iowa County, Wisconsin|Iowa County]], formed on January 1, 1830, from part of Crawford County. Transferred to Wisconsin Territory on July 3, 1836, and continues as [[Iowa County, Wisconsin]].
# [[Isle Royale County, Michigan|Isle Royale County]], formed on March 4, 1875, from part of [[Keweenaw County, Michigan|Keweenaw County]]. County became officially unorganized on March 13, 1885, and was attached to [[Houghton County, Michigan|Houghton County]], for judicial and administrative purposes. Michigan Legislature officially dissolved Isle Royale County and returned it to Keweenaw County on April 9, 1897.
#[[Keskkauko County, Michigan|Keskkauko County]], formed on April 1, 1840, from part of [[Mackinac County, Michigan|Mackinac County]]. Renamed [[Charlevoix County, Michigan|Charlevoix County]], on March 8, 1843. Annexed to [[Emmet County, Michigan|Emmet County]], on January 29, 1853, and eliminated as a county. Reformed as Charlevoix County from Emmet, [[Antrim County, Michigan|Antrim]], and [[Otsego County, Michigan|Otsego]], Counties on April 2, 1869, albeit with boundaries that differed somewhat from the 1840–1853 iteration of Keskkauko–Charlevoix County.
# [[Manitou County, Michigan|Manitou County]], formed on February 12, 1855, from parts of Emmet County and Leelanau County. On March 16, 1861, Manitou County was attached to Mackinac County for meetings of the District Court, but all other County functions were unchanged. Four years later, on March 10, 1865, the District Court attachment was changed to Leelanau County instead of Mackinac. Another four years later, on March 24, 1869, the District Court attachment to Leelanau County was terminated. The entire Manitou County government was dissolved on April 4, 1895, and the county was abolished. It was absorbed by [[Charlevoix County, Michigan|Charlevoix County]], and [[Leelanau County, Michigan|Leelanau County]].
# [[Michilimackinac District]] formed on July 3, 1805, as a county precursor by Territorial Governor [[William Hull]] to carry out the Territory's judicial and administrative functions. Incorporated into [[Wayne County, Michigan|Wayne County]], on October 18, 1816.
# [[Milwaukee County, Wisconsin|Milwaukee County]], formed on September 6, 1834, from part of Brown County. Transferred to Wisconsin Territory on July 3, 1836, and continues as [[Milwaukee County, Wisconsin]].
# [[Omeena County, Michigan|Omeena County]], formed on April 1, 1840, from part of [[Mackinac County, Michigan|Mackinac County]]. Annexed to [[Grand Traverse County, Michigan|Grand Traverse County]], on February 3, 1853.
# [[Wyandot County, Michigan|Wyandot County]], formed on April 1, 1840, from part of Mackinac County. Annexed to [[Cheboygan County, Michigan|Cheboygan County]], on January 29, 1853.
#[[Washington County, Michigan|Washington County]], formed in 1867 from [[Marquette County, Michigan|Marquette County]], but declared unconstitutional.