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County | Date Created | Date Organized | Parent County | County Seat |
ALCONA | 1 Apr 1840 | 12 Mar 1869 | Alpena, Cheboygan | Harrisville |
ALGER | 17 Mar 1885 | 17 Mar 1885 | Schoolcraft | Munising |
ALLEGAN | 2 Mar 1831 | 7 Sept1835 | Kalamazoo | Allegan |
ALPENA | 1 Apr 1840 | 7 Feb 1857 | Cheboygan | Alpena |
ANTRIM | 1 Apr 1840 | 11 Mar 1863 | Grand Traverse | Bellaire |
ARENAC | 21 Apr 1883 | 21 Apr 1883 | Bay, Saginaw | Standish |
BARAGA | 19 Feb 1875 | 19 Feb 1875 | Houghton | L'anse |
BARRY | 29 Oct 1829 | 15 Mar 1839 | St. Joseph, Kalamazoo | Hastings |
BAY | 20 Apr 1857 | 20 Apr 1857 | Saginaw, Midland | Bay City |
BENZIE | 27 Feb 1863 | 30 Mar 1869 | Grand Traverse, Leelanau | Beulah |
BERRIEN | 29 Oct 1829 | 1Sept1831 | Cass | Saint Joseph |
BRANCH | 29 Oct 1829 | 1 Mar 1833 | St. Joseph, Lenawee | Coldwater |
CALHOUN | 29 Oct 1829 | 1 Apr 1833 | St. Joseph, Kalamazoo | Marshall |
CASS | 29 Oct 1829 | 29 Oct 1829 | Lenawee | Cassopolis |
CHARLEVOIX | 2 Apr 1869 | 2 Apr 1869 | Emmet | Charlevoix |
CHEBOYGAN | 1 Apr 1840 | 29 Jan 1853 | Mackinac | Cheboygan |
CHIPPEWA | 1 Feb 1827 | 1 Feb 1827 | Mackinac | Sault Sainte Marie |
CLARE | 1 Apr 1840 | 13 Mar 1871 | Isabella, Midland, Mecosta | Harrison |
CLINTON | 2 Mar 1831 | 2 Mar 1831 | Shiawassee, Kent | Saint Johns |
CRAWFORD | 1 Apr 1840 | 22 Mar 1879 | Cheboygan, Antrim, Kalkaska | Grayling |
DELTA | 9 Mar 1843 | 12 Mar 1861 | Mackinac | Escanaba |
DICKINSON | 21 May 1891 | 21 May 1891 | Marquette, Menominee | Iron Mountain |
EATON | 29 Oct 1829 | 29 Dec 1837 | St. Joseph, Kalamazoo, Calhoun | Charlotte |
EMMET | 1 Apr 1840 | 29 Jan 1853 | Mackinac | Petoskey |
GENESEE | 28 Mar 1835 | 28 Mar 1835 | Lapeer | Flint |
GLADWIN | 2 Mar 1831 | 18 Apr 1875 | Saginaw, Midland | Gladwin |
GOGEBIC | 7 Feb 1887 | 7 Feb 1887 | Ontonagon | Bessemer |
GRAND TRAVERSE | 7 Apr 1851 | 7 Apr 1851 | Mackinac | Traverse City |
GRATIOT | 2 Mar 1831 | 3 Feb 1855 | Saginaw, Clinton | Ithaca |
HILLSDALE | 29 Oct 1829 | 11 Feb 1835 | Lenawee | Hillsdale |
HOUGHTON | 19 Mar 1845 | 18 May 1846 | Marquette, Schoolcraft, Ontonagon | Houghton |
HURON | 1 Apr 1840 | 25 Jan 1859 | Saginaw, St. Clair, Sanilac | Badaxe |
INGHAM | 29 Oct 1829 | 4 Jun 1838 | Washtenaw, Jackson, Eaton | Mason |
IONIA | 2 Mar 1831 | 3 Apr 1837 | Kent | Ionia |
IOSCO | 1 Apr 1840 | 16 Feb 1857 | Saginaw, Cheboygan | Tawas City |
IRON | 3 Apr 1885 | 3 Apr 1885 | Marquette, Menominee | Crystal Falls |
ISABELLA | 2 Mar 1831 | 11 Feb 1859 | Saginaw, Midland | Mount Pleasant |
JACKSON | 29 Oct 1829 | 1 Aug 1832 | Washtenaw | Jackson |
KALAMAZOO | 29 Oct 1829 | 1 Oct 1830 | St. Joseph | Kalamazoo |
KALKASKA | 1 Apr 1840 | 27 Jan 1871 | Grand Traverse, Antrim | Kalkaska |
KENT | 2 Mar 1831 | 4 Apr 1836 | Kalamazoo | Grand Rapids |
KEWEENAW | 11 Mar 1861 | 11 Mar 1861 | Houghton | Eagle River |
LAKE | 1 Apr 1840 | 1 May 1871 | Oceana, Mason, Newaygo | Baldwin |
LAPEER | 10 Sep 1822 | 2 Feb 1835 | Oakland | Lapeer |
LEELANAU | 1 Apr 1840 | 27 Feb 1863 | Grand Traverse | Leland |
LENAWEE | 10 Sep 1822 | 31 Dec 1826 | Wayne | Adrian |
LIVINGSTON | 21 Mar 1833 | 4 Apr 1836 | Shiawassee, Washtenaw | Howell |
LUCE | 1 Mar 1887 | 1 Mar 1887 | Chippewa, Mackinac | Newberry |
MACKINAC | 26 Oct 1818 | 26 Jan 1837 | Wayne and the French | Saint Ignace |
MACOMB | 15 Jan 1818 | 15 Jan 1818 | Wayne | Mount Clemens |
MANISTEE | 1 Apr 1840 | 13 Feb 1855 | Mackinac, Ottawa, Oceana, Grand Traverse | Manistee |
MARQUETTE | 9 Mar 1843 | 1 Dec 1851 | Chippewa, Houghton | Marquette |
MASON | 1 Apr 1840 | 13 Feb 1855 | Ottawa, Oceana | Ludington |
MECOSTA | 1 Apr 1840 | 11 Feb 1858 | Newaygo | Bigrapids |
MENOMINEE | 15 Mar 1861 | 15 Mar 1861 | Marquette | Menominee |
MIDLAND | 2 Mar 1831 | 31 Dec 1850 | Saginaw | Midland |
MISSAUKEE | 1 Apr 1840 | 11 Mar 1871 | Antrim, Grand Traverse | Lake City |
MONROE | 14 Jul 1817 | 14 Jul 1817 | Wayne | Monroe |
MONTCALM | 2 Mar 1831 | 20 Mar 1850 | Ionia | Stanton |
MONTMORENCY | 1 Apr 1840 | 21 May 1881 | Cheboygan, Alpena | Atlanta |
MUSKEGON | 4 Feb 1859 | 4 Feb 1859 | Ottawa | Muskegon |
NEWAYGO | 1 Apr 1840 | 27 Jan 1851 | Kent, Muskegon, Oceana | White Cloud |
OAKLAND | 12 Jan 1819 | 28 Mar 1820 | Wayne | Pontiac |
OCEANA | 2 Mar 1831 | 7 Apr 1851 | Ottawa | Hart |
OGEMAW | 1 Apr 1840 | 27 Apr 1875 | Saginaw, Branch | West Branch |
ONTONAGON | 9 Mar 1843 | 1 Jan 1853 | Chippewa, Houghton | Ontonagon |
OSCEOLA | 1 Apr 1840 | 17 Mar 1869 | Mason, Newaygo, Mecosta | Reed City |
OSCODA | 1 Apr 1840 | 10 Mar 1881 | Cheboygan, Alpena, Alcona | Mio |
OTSEGO | 1 Apr 1840 | 12 Mar 1875 | Michilimackinac | Gaylord |
OTTAWA | 2 Mar 1831 | 19 Dec 1837 | Kent | Grand Haven |
PRESQUE ISLE | 1 Apr 1840 | 31 Mar 1871 | Mackinac | Rogers City |
ROSCOMMON | 1 Apr 1840 | 20 Mar 1875 | Cheboygan, Midland | Roscommon |
SAGINAW | 10 Sep 1822 | 9 Feb 1835 | Oakland | Saginaw |
SAINT CLAIR | 28 Mar 1820 | 8 May 1821 | Wayne | Port Huron |
SAINT JOSEPH | 29 Oct 1829 | 29 Oct 1829 | Wayne | Centreville |
SANILAC | 10 Sep 1822 | 31 Dec 1849 | Oakland, St. Clair, Lapeer | Sandusky |
SCHOOLCRAFT | 9 Mar 1843 | 23 Mar 1871 | Chippewa, Houghton, Marquette | Manistique |
SHIAWASSEE | 10 Sep 1822 | 18 Mar 1837 | Oakland, Genesee | Corunna |
TUSCOLA | 1 Apr 1840 | 2 Mar 1850 | Saginaw | Caro |
VAN BUREN | 29 Oct 1829 | 3 Apr 1837 | Cass | Paw Paw |
WASHTENAW | 10 Sep 1822 | 31 Dec 1826 | Wayne, Oakland | Ann Arbor |
WAYNE | 21 Nov 1815 | 21 Nov 1815 | Original County | Detroit |
WEXFORD | 1 Apr 1840 | 30 Mar 1869 | Manistee | Cadillac |