| Name of County
|
Date Formed
|
Parent County
|
Progeny County
|
| Aishcum
|
01 Apr 1840
|
Oceana
|
renamed Lake 1843
|
| Alcona
|
08 Mar 1843
|
renamed from Neewago
|
Oscoda
|
| Alger
|
17 Mar 1885
|
Schoolcraft
|
none
|
| Allegan
|
02 Mar 1831
|
Kalamazoo
|
none
|
| Alpena
|
08 Mar 1843
|
renamed from Anamickee
|
Alcona 1869, Oscoda 1840, Otsego 1840
|
| Anamickee
|
01 Apr 1840
|
Michigan Territory
|
renamed Alpena 1843
|
| Antrim
|
08 Mar 1843
|
renamed from Meegisee
|
none
|
| Arenac
|
02 Mar 1831
|
Bay, Saginaw
|
none
|
| Baraga
|
19 Feb 1875
|
Houghton
|
none
|
| Barry
|
29 Oct 1829
|
St. Joseph, Kalamazoo
|
none
|
| Bay
|
17 Feb 1857
|
Saginaw, Midland
|
Arenac 1831
|
| Benzie
|
27 Feb 1863
|
Grand Traverse, Leelanau
|
none
|
| Berrien
|
29 Oct 1829
|
Cass
|
none
|
| Bleeker
|
1861
|
Marquette
|
renamed Menominee 1863
|
| Branch
|
29 Oct 1829
|
Michigan Territory
|
none
|
| Brown
|
26 Oct 1818
|
Michigan Territory
|
now in State of Wisconsin
|
| Calhoun
|
29 Oct 1829
|
St. Joseph, Kalamazoo
|
Eaton 1829
|
| Cass
|
29 Oct 1829
|
Lenawee
|
Berrien 1829, Van Buren 1837
|
| Charlevoix
|
08 Mar 1843
|
renamed from Reshkaiko
|
none
|
| Cheboygan
|
01 Apr 1840
|
Mackinac
|
Alcona 1859, Alpena 1857, Forrest 1913, Iosco 1857, Ogemaw 1875, Oscoda 1840, Otsego 1840
|
| Cheonoquet
|
01 Apr 1840
|
Michigan Territory
|
renamed Montmorency 1843
|
| Chippewa
|
26 Dec 1826
|
Mackinac
|
Houghton 1845, Luce 1887, Ontonagon 1848, Schoolcraft 1848
|
| Clare
|
08 Mar 1843
|
renamed from Kaykakee
|
none
|
| Clinton
|
02 Mar 1831
|
Shiawassee, Kent
|
Gratiot 1855
|
| Crawford (old)
|
26 Oct 1818
|
Michigan Territory
|
now in State of Wisconsin
|
| Crawford
|
01 Apr 1840
|
Michigan Territory
|
none
|
| Delta
|
09 Mar 1843
|
Schoolcraft
|
none
|
| Demoine
|
01 Jun 1833
|
Michigan Territory
|
now in State of Iowa
|
| Dickinson
|
15 Jan 1851
|
Kossuth
|
Emmet 1851
|
| Dubuque (old)
|
06 Sep 1834
|
Michigan Territory
|
now in State of Iowa
|
| Eaton
|
29 Oct 1829
|
St. Joseph, Calhoun, Kalamazoo
|
Ingham 1829
|
| Emmet
|
08 Mar 1843
|
renamed from Tonedagana
|
Charlevoix 1869
|
| Genesee
|
08 Mar 1836
|
Oakland
|
none
|
| Gladwin
|
02 Mar 1831
|
Saginaw, Midland
|
none
|
| Gogebic
|
07 Feb 1881
|
Ontonagon
|
none
|
| Grand Traverse
|
01 Apr 1840
|
Mackinac
|
Antrim 1843, Benzie 1863, Leelanau 1863
|
| Gratiot
|
02 Mar 1831
|
Saginaw, Clinton
|
none
|
| Hillsdale
|
29 Oct 1829
|
Lenawee
|
none
|
| Houghton
|
09 Mar 1845
|
Chippewa
|
Baraga 1875, Keweenaw 1861, Ontonagon 1848, Schoolcraft 1848
|
| Huron
|
01 Apr 1840
|
Saginaw, St. Clair, Sanilac
|
none
|
| Ingham
|
29 Oct 1829
|
Washtenaw, Eaton, Jackson
|
none
|
| Ionia
|
02 Mar 1831
|
Kent
|
Montcalm 1831
|
| Iosco
|
08 Mar 1843
|
renamed from Kanotin
|
Ogemaw 1875
|
| Iowa
|
09 Oct 1829
|
Michigan Territory
|
now in State of Wisconsin
|
| Iron
|
03 Apr 1885
|
Marquette, Menominee
|
none
|
| Isabella
|
02 Mar 1831
|
Saginaw, Midland
|
Clare 1871
|
| Isle Royal
|
1875
|
Keweenaw
|
dissolved 1897, part of Keweenaw
|
| Jackson
|
29 Oct 1829
|
Washtenaw
|
none
|
| Kalamazoo
|
29 Oct 1829
|
St. Joseph
|
Allegan 1835, Barry 1829, Calhoun 1829, Eaton 1829, Kent 1836
|
| Kalkaska
|
08 Mar 1843
|
renamed from Wabasee
|
none
|
| Kanotin
|
01 Apr 1840
|
Michigan Territory
|
renamed Iosco 1843
|
| Kautawaubet
|
01 Apr 1840
|
Michigan Territory
|
renamed Wexford 1843
|
| Kaykakee
|
01 Apr 1840
|
Michigan Territory
|
renamed Clare 1843
|
| Kent
|
02 Mar 1831
|
Kalamazoo
|
Clinton 1839, Ionia 1831, Mecosta 1859, Newaygo 1840, Ottawa 1837
|
| Keweenaw
|
11 Mar 1861
|
Houghton, Iowa
|
Isle Royal (dissolved 1897)
|
| Lake
|
08 Mar 1843
|
renamed from Aishcum
|
none
|
| Lapeer
|
10 Sep 1822
|
Oakland
|
Sanilac 1848
|
| Leelanau
|
01 Apr 1840
|
Grand Traverse
|
Benzie 1863
|
| Lenawee
|
10 Sep 1822
|
Indian lands
|
Cass 1829, Hillsdale 1835
|
| Livingston
|
24 Mar 1836
|
Shiawassee, Washtenaw
|
none
|
| Luce
|
01 Mar 1887
|
Chippewa, Mackinac
|
none
|
| Mackinac
|
08 Mar 1843
|
renamed from Michilimackinac
|
Cheboygan 1840, Chippewa 1826, Emmet 1853, Grand Traverse 1840, Luce 1887, Manistee 1855, Otsego 1840
|
| Macomb
|
11 Mar 1818
|
Wayne
|
none
|
| Manistee
|
01 Apr 1840
|
Mackinac, Ottawa, Oceana
|
none
|
| Manitou
|
13 Feb 1855
|
Michigan Territory
|
dissolved 1895
|
| Marquette
|
09 Mar 1843
|
Schoolcraft
|
Dickinson 1891, Iron 1885, Menominee 1863, Washington 1867
|
| Mason
|
08 Mar 1843
|
renamed from Notipekago
|
Lake 1871, Osceola 1869
|
| Mecosta
|
01 Apr 1840
|
Kent, Newaygo
|
Clare 1871, Osceola 1869
|
| Meegisee
|
01 Apr 1840
|
Michigan Territory
|
renamed Antrim 1843
|
| Menominee
|
19 Mar 1863
|
renamed from Bleeker 1861
|
Dickinson 1891, Iron 1885
|
| Michilimackinac
|
26 Oct 1818
|
Michigan Territory
|
renamed Mackinac 1843
|
| Midland
|
02 Mar 1831
|
Saginaw
|
Bay 1857, Clare 1871, Gladwin 1855, Isabella 1831, Ogemaw 1875
|
| Mikensauk
|
01 Apr 1840
|
Michigan Territory
|
renamed Roscommon 1843
|
| Milwaukee
|
06 Sep 1834
|
Michigan Territory
|
now in State of Wisconsin
|
| Monroe
|
14 Jul 1817
|
Wayne
|
none
|
| Montcalm
|
02 Mar 1831
|
Ionia
|
none
|
| Montmorency
|
08 Mar 1843
|
renamed from Cheonoguet
|
none
|
| Muskegon
|
04 Feb1 859
|
Ottawa, Newaygo
|
none
|
| Negwegon (old)
|
01 Apr 1840
|
Michigan Territory
|
renamed Alcona 1843
|
| Newaygo
|
01 Ap 1840
|
Kent, Muskegon, Oceana
|
Lake 1871, Mecosta 1854, Osceola 1869, Muskegon 1859
|
| Notipekago
|
01 Apr 1840
|
Michigan Territory
|
renamed Mason 1843
|
| Oakland
|
12 Jan 1819
|
Michigan Territory
|
Genesee 1836, lapeer 1835, Sanilac 1848, Saginaw 1822, Shaiwassee 1822
|
| Oceana
|
02 Mar 1831
|
Ottawa
|
Lake 1871, Manistee 1855, Mason 1855, Newaygo 1840
|
| Ogemaw
|
27 Feb 1875
|
Cheboygan, Midland, Iosco
|
none
|
| Okkado
|
01 Apr 1840
|
Michigan Territory
|
renamed Otsego 1843
|
| Ontonagon
|
03 Apr 1848
|
Chippewa, Houghton
|
Gogebic 1881
|
| Osceola
|
08 Mar 1843
|
renamed from Unwattin
|
none
|
| Oscoda
|
01 Apr 1840
|
Michigan Territory
|
none
|
| Otsego
|
08 Mar 1843
|
renamed from Okkado
|
none
|
| Ottawa
|
02 Mar 1831
|
Kent
|
Manistee 1855, Mason 1855
|
| Presque Isle
|
01 Apr 1840
|
Michigan Territory
|
none
|
| Reshkaiko
|
01 Apr 1840
|
Michigan Territory
|
renamed Charlevoix 1843
|
| Roscommon
|
08 Mar 1843
|
renamed from Mikenauk
|
none
|
| Saginaw
|
10 Sep 1822
|
Oakland
|
Arenac 1883, Bay 1857, Gladwin 1855, Gratiot 1855, Huron 1840, Iosco 1857, Isabella 1831, Midland 1850
|
| St. Clair
|
10 Sep 1820
|
Wayne
|
Huron 1840, Sanilac 1848
|
| St. Joseph
|
29 Oct 1829
|
Wayne
|
Barry 1829, Calhoun 1829, Eaton 1829, Kalamazoo 1829
|
| Sanilac
|
10 Sep 1822
|
Oakland, St. Clair, Lapeer
|
Huron 1840, Tuscola 1850
|
| Schoolcraft
|
09 Mar 1843
|
Chippewa, Houghton
|
Alger 1855, Delta 1861, Marquette 1851
|
| Shawano
|
26 Oct 1818
|
Michigan Territory
|
now in State of Wisconsin
|
| Shiawassee
|
10 Sep 1822
|
Oakland, Genesee
|
Clitnon 1839, Livingston 1836
|
| Tonedagana
|
01 Apr 1840
|
Michigan Territory
|
renamed Emmet 1843
|
| Tuscola
|
01 Apr 1840
|
Sanilac
|
none
|
| Unwattin
|
01 Apr 1840
|
Michigan Territory
|
renamed Osceola 1843
|
| Van Buren
|
29 Oct 1829
|
Cass
|
none
|
| Wabasee
|
01 Apr 1840
|
Michigan Territory
|
renamed Kalkaska 1843
|
| Washtenaw
|
20 Nov 1822
|
Wayne
|
Livingston 1836, Ingahm 1829, Jackson 1832
|
| Wayne
|
18 Aug 1796
|
Northwest Territory
|
Michilimackinac 1818, Macomb 1818, Monroe 1817, St. Clair 1820, St. Joseph 1820, Washtenaw 1826
|
| Wexford
|
08 Mar 1843
|
renamed from Kautawaubet
|
none
|
| Wyandotte
|
01 Apr 1840
|
Michigan Territory
|
none
|