Central

Counties: Bay, Clinton, Eaton, Genesee, Huron, Gratiot, Ingham, Jackson, Lapeer, Livingston, Saginaw, Sanilac, Shiawassee, Tuscola, Washtenaw

Northern

Counties: Alcona, Alger, Alpena, Antrim, Arenac, Baraga, Benzie, Charlevoix, Cheboygan, Chippewa, Clare, Crawford, Delta, Dickinson, Emmet, Gladwin, Gogebic, Grand Traverse, Houghton, Iosco, Iron, Isabella, Kalkaska, Keweenaw, Lake, Leelanau, Luce, Mackinac, Manistee, Marquette, Mason, Mecosta, Menominee, Midland, Missaukee, Montmorency, Newaygo, Oceana, Ogemaw, Ontonagon, Osceola, Oscoda, Otsego, Presque Isle, Roscommon, Schoolcraft, Wexford

Southeastern

Counties: Lenawee, Macomb, Monroe, Oakland, St. Clair, Wayne

Southwestern

Counties: Allegan, Barry, Berrien, Branch, Calhoun, Cass, Hillsdale, Ionia, Kalamazoo, Kent, Montcalm, Muskegon, Ottawa, St. Joseph, Van Buren