| County | Pop. (2000) | Latest Visit | County Seat | Visited? | |
| Alcona | 11,719 | 12-Aug-2006 | Harrisville | yes | |
| Alger | 9,862 | 11-Aug-2006 | Munising | ||
| Allegan | 105,665 | 28-Jul-2003 | Allegan | ||
| Alpena | 31,314 | 11-Aug-2006 | Alpena | yes | |
| Antrim | 23,110 | 12-Aug-2006 | Bellaire | ||
| Arenac | 17,269 | 12-Aug-2006 | Standish | yes | |
| Baraga | 8,746 | 10-Aug-2006 | L’Anse | yes | |
| Barry | 56,755 | 13-Aug-1996 | Hastings | ||
| Bay | 110,157 | 6-Aug-2007 | Bay City | yes | |
| Benzie | 15,998 | 28-Jul-2003 | Beulah | yes | |
| Berrien | 162,453 | 29-Jul-2003 | St. Joseph | yes | |
| Branch | 45,787 | 7-Aug-2007 | Coldwater | ||
| Calhoun | 137,985 | 7-Aug-2007 | Marshall | yes | |
| Cass | 51,104 | 15-Aug-1990 | Cassopolis | yes | |
| Charlevoix | 26,090 | 28-Jul-2003 | Charlevoix | ||
| Cheboygan | 26,448 | 11-Aug-2006 | Cheboygan | yes | |
| Chippewa | 38,543 | 12-Aug-2006 | Sault Ste. Marie | ||
| Clare | 31,252 | 12-Aug-2006 | Harrison | ||
| Clinton | 64,753 | 7-Aug-2007 | St. Johns | ||
| Crawford | 14,273 | 12-Aug-2006 | Grayling | yes | |
| Delta | 38,520 | 11-Aug-2006 | Escanaba | yes | |
| Dickinson | 27,472 | 11-Aug-2006 | Iron Mountain | yes | |
| Eaton | 103,655 | 7-Aug-2007 | Charlotte | yes | |
| Emmet | 31,437 | 11-Aug-2006 | Petoskey | ||
| Genesee | 436,141 | 6-Aug-2007 | Flint | yes | |
| Gladwin | 26,023 | 12-Aug-2006 | Gladwin | ||
| Gogebic | 17,370 | 10-Aug-2006 | Bessemer | yes | |
| Grand Traverse | 77,654 | 11-Aug-2006 | Traverse City | yes | |
| Gratiot | 42,285 | 12-Aug-2006 | Ithaca | ||
| Hillsdale | 46,527 | 6-Jul-1997 | Hillsdale | ||
| Houghton | 36,016 | 10-Aug-2006 | Houghton | yes | |
| Huron | 36,079 | 5-Jul-1997 | Bad Axe | yes | |
| Ingham | 279,320 | 12-Aug-2006 | Mason | ||
| Ionia | 61,518 | 13-Aug-1996 | Ionia | ||
| Iosco | 27,339 | 12-Aug-2006 | Tawas City | yes | |
| Iron | 13,138 | 10-Aug-2006 | Crystal Falls | yes | |
| Isabella | 63,351 | 12-Aug-2006 | Mount Pleasant | yes | |
| Jackson | 158,422 | 15-Aug-1990 | Jackson | yes | |
| Kalamazoo | 238,603 | 29-Jul-2003 | Kalamazoo | yes | |
| Kalkaska | 16,571 | 12-Aug-2006 | Kalkaska | yes | |
| Kent | 574,335 | 28-Jul-2003 | Grand Rapids | yes | |
| Keweenaw | 2,301 | 10-Aug-2006 | Eagle River | yes | |
| Lake | 11,333 | 28-Jul-2003 | Baldwin | ||
| Lapeer | 87,904 | 5-Jul-1997 | Lapeer | ||
| Leelanau | 21,119 | 11-Aug-2006 | Leland | ||
| Lenawee | 98,890 | 11-Aug-1992 | Adrian | ||
| Livingston | 156,951 | 27-Jul-2009 | Howell | ||
| Luce | 7,024 | 11-Aug-2006 | Newberry | ||
| Mackinac | 11,943 | 11-Aug-2006 | St. Ignace | yes | |
| Macomb | 788,149 | 5-Jul-1997 | Mount Clemens | yes | |
| Manistee | 24,527 | 28-Jul-2003 | Manistee | yes | |
| Marquette | 64,634 | 10-Aug-2006 | Marquette | ||
| Mason | 28,274 | 28-Jul-2003 | Ludington | ||
| Mecosta | 40,553 | 28-Jul-2003 | Big Rapids | yes | |
| Menominee | 25,326 | 11-Aug-2006 | Menominee | ||
| Midland | 82,874 | 6-Aug-2007 | Midland | yes | |
| Missaukee | 14,478 | 28-Jul-2003 | Lake City | yes | |
| Monroe | 145,945 | 27-Jul-2009 | Monroe | yes | |
| Montcalm | 61,266 | 28-Jul-2003 | Stanton | ||
| Montmorency | 10,315 | 11-Aug-2006 | Atlanta | yes | |
| Muskegon | 170,200 | 28-Jul-2003 | Muskegon | yes | |
| Newaygo | 47,874 | 28-Jul-2003 | White Cloud | ||
| Oakland | 1,194,156 | 25-Jul-1999 | Pontiac | yes | |
| Oceana | 26,873 | 28-Jul-2003 | Hart | yes | |
| Ogemaw | 21,645 | 12-Aug-2006 | West Branch | yes | |
| Ontonagon | 7,818 | 10-Aug-2006 | Ontonagon | ||
| Osceola | 23,197 | 28-Jul-2003 | Reed City | yes | |
| Oscoda | 9,418 | 12-Aug-2006 | Mio | yes | |
| Otsego | 23,301 | 11-Aug-2006 | Gaylord | yes | |
| Ottawa | 238,314 | 28-Jul-2003 | Grand Haven | yes | |
| Presque Isle | 14,411 | 11-Aug-2006 | Rogers City | yes | |
| Roscommon | 25,469 | 12-Aug-2006 | Roscommon | ||
| Saginaw | 210,039 | 7-Aug-2007 | Saginaw | yes | |
| St. Clair | 164,235 | 5-Jul-1997 | Port Huron | yes | |
| St. Joseph | 62,422 | 16-Aug-1998 | Centreville | ||
| Sanilac | 44,547 | 5-Jul-1997 | Sandusky | yes | |
| Schoolcraft | 8,903 | 11-Aug-2006 | Manistique | ||
| Shiawassee | 71,687 | 7-Aug-2007 | Corunna | ||
| Tuscola | 58,266 | 5-Jul-1997 | Caro | ||
| Van Buren | 76,263 | 29-Jul-2003 | Paw Paw | yes | |
| Washtenaw | 322,895 | 27-Jul-2009 | Ann Arbor | yes | |
| Wayne | 2,061,162 | 27-Jul-2009 | Detroit | yes | |
| Wexford | 30,484 | 28-Jul-2003 | Cadillac | yes |
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