| Aischum: |
Formed in 1 April 1840 from Mackinac County and renamed Lake County in 8 March 1843 |
| Anamickee: |
Formed in 1 April 1840 and renamed Alpena County in 8 March 1843 |
| Bleeker: |
Formed in 1861 and renamed Menominee County in 19 March 1863 |
| Brown: |
Formed in 26 Oct 1818, became part of the Wisconsin Terr. in December 7th, 1836.
Now in Wisconsin |
| Charlevoix(old): |
Formed in 1840 as Keskkauko County and renamed Charlevoix County in 1843. Merged with Emmet Co in 1853 |
| Cheonoquet: |
Formed in 1 April 1840 and renamed Montmorency County in 8 March 1843) |
| Crawford(old): |
Formed in 1818 from unorganized land, became part of the Wisconsin Terr in 1836. Now in Wisconsin |
| Des Moines: |
Formed in 1834 from unorganized land, became part of the Wisconsin Terr in 1836. Now in Iowa |
| Dubuque: |
Formed in 1834 from unorganized land, became part of the Wisconsin Terr in 1836. Now in Iowa |
| Iowa: |
Formed in 1830 from Crawford County, became part of the Wisconsin Territory. in 1836. Now in Wisconsin |
| Isle Royale : |
Formed in 1875 from Keweenaw County and attached to Houghton Co in 1885, abolished in 1897 and became part of Keweenaw Co |
| Kanotin: |
Formed in 1 Feb 1840 from unorganized land and renamed Iosco County in 1843 |
| Kautawaubet: |
Formed in 1 April 1840 from Mackinac County and renamed Wexford County in 8 March 1843. |
| Kayakee: |
Formed in 1 April 1840 from Mackinac County, Saginaw Co and unorganized land; renamed Clare County in 8 March 1843 |
| Kautawaubet: |
Formed in 1840 from Mackinac County and renamed Charlevoix County in 1843 |
| Isle Royale: |
Formed in 1875 from Keweenaw County and attached to Houghton County in 1885; abolished in 1897and became part of Keweenaw County |
| Negwegon: |
Formed in 1840 from Mackinac County and unorganized land; renamed Alcona County in 1843 |
| Notipekago: |
Formed in 1840 from Mackinac County and Ottawa County; renamed Mason County in 1843 |
| Meegisee: |
Formed in 1840 and renamed Antrim County in 1843 |
| Mikenauk: |
Formed in 1 April 1840 from Mackinac County and Unorganized Land renamed Roscommon County in 8 March 1843. |
| Manitou: |
Formed in 13 Feb 1855 from Emmet and Leelanau Counties. In 1861 the county government was disorganized and Manitou was attached to Mackinac County. In 1865 it was attached to Leelanau County, then again attached to Mackinac County in 1869. Finally in 1895 Manitou was abolished and was absorbed by Charlevoix and Leelanau Counties |
| Meegisee: |
Formed in 1 April 1840 from Mackinac County and renamed Antrim County in 8 March 1843 |
| Michilimackinac: |
Formed in 26 Oct 1818 from Wayne County and renamed Mackinac County in 8 March 1843 |
| Milwaukee: |
Formed in 1834 from Brown County and became part of the Wisconsin Territory in 1836; now in Wisconsin |
| Negwegon: |
aka Neewago; Formed in 1 April 1840 from Unorganized Land and renamed Alcona County in 8 March 1843 |
| Notipekago: |
aka Nontipekago; Formed in 1 April 1840 from Mackinac County and renamed Mason County in 8 March 1843 |
| Okkuddo: |
Formed in 1840 from Mackinac County and renamed Otsego County in 1843 |
| Omeena: |
Formed in 1840 from Mackinac County and abolished in 1853; became part of Grand Traverse County in 1843 |
| Okkuddo: |
aka Okkudo; Formed in 1 April 1840 from Mackinac County and renamed Otsego County in 8 March 1843 |
| Omeena: |
Formed in 1840 from Mackinac County and abolished in 1853; became part of Grand Traverse County in 1853 |
| Reshkauko: |
Organized 1 April 1840 and renamed Charlevoix County 8 March 1843 |
Shawono:
|
aka Shawano and Shawona; Formed in 26 oct 1818 from Mackinac County and renamed Crawford County in 8 March 1843 |
| Tonedagana: |
Formed in 1 April 1840 from Mackinac County and renamed Emmet County in 8 March 1843 |
| Unwattin: |
Formed in 1 April 1840 from Mackinac County and renamed Osceola County in 8 March 1843; Some records in Ottawa County |
| Wabassee: |
Formed in 1 April 1840 from Mackinac County and renamed Kalkaska County in 8 March 1843 |
| Washington: |
Formed in 1867 from Marquette County but declared unconstitutional |
| Wyandiot: |
Formed in 1840 from Mackinac County and abolished in 1853; became part of Cheboygan County in 1853 |