| Alcona County | 1 | 687 | Alcona Community Schools |
| Alger County | 4 | 941 | Munising Public Schools, Superior Central School District, Burt Township School District, AuTrain-Onota Public Schools |
| Allegan County | 10 | 16,433 | All 10 Allegan County districts → |
| Alpena County | 1 | 3,553 | Alpena Public Schools |
| Antrim County | 6 | 2,533 | Elk Rapids Schools, Mancelona Public Schools, Bellaire Public Schools, Ellsworth Community School, Central Lake Public Schools, Alba Public Schools |
| Arenac County | 2 | 1,897 | Standish-Sterling Community Schools, Au Gres-Sims School District |
| Baraga County | 3 | 829 | L'Anse Area Schools, Baraga Area Schools, Arvon Township School District |
| Barry County | 4 | 8,278 | Thornapple Kellogg School District, Hastings Area School District, Lakewood Public Schools, Delton Kellogg Schools |
| Bay County | 4 | 11,339 | Bay City School District, Bangor Township Schools, Essexville-Hampton Public Schools, Pinconning Area Schools |
| Benzie County | 2 | 1,629 | Benzie County Central Schools, Frankfort-Elberta Area Schools |
| Berrien County | 15 | 22,852 | All 15 Berrien County districts → |
| Branch County | 4 | 5,784 | Coldwater Community Schools, Quincy Community Schools, Bronson Community School District, Union City Community Schools |
| Calhoun County | 9 | 16,352 | Lakeview Sch. District (Calhoun), Battle Creek Public Schools, Harper Creek Community Schools, Marshall Public Schools, Pennfield Schools, Homer Community School District, Athens Area Schools, Mar Lee School District, Tekonsha Community Schools |
| Cass County | 4 | 5,795 | Edwardsburg Public Schools, Dowagiac Union School District, Cassopolis Public Schools, Marcellus Community Schools |
| Charlevoix County | 5 | 2,975 | Boyne City Public Schools, Charlevoix Public Schools, East Jordan Public Schools, Boyne Falls Public School District, Beaver Island Community School |
| Cheboygan County | 3 | 2,381 | Cheboygan Area Schools, Inland Lakes Schools, Wolverine Community School District |
| Chippewa County | 6 | 3,442 | Sault Ste. Marie Area Schools, Rudyard Area Schools, Brimley Area Schools, Pickford Public Schools, DeTour Area Schools, Whitefish Township Schools |
| Clare County | 3 | 3,738 | Clare Public Schools, Harrison Community Schools, Farwell Area Schools |
| Clinton County | 6 | 9,041 | DeWitt Public Schools, St. Johns Public Schools, Ovid-Elsie Area Schools, Bath Community Schools, Pewamo-Westphalia Community Schools, Fowler Public Schools |
| Crawford County | 1 | 1,641 | Crawford AuSable Schools |
| Delta County | 5 | 4,279 | Escanaba Area Public Schools, Gladstone Area Schools, Rapid River Public Schools, Mid Peninsula School District, Big Bay De Noc School District |
| Dickinson County | 4 | 3,574 | Breitung Township School District, Iron Mountain Public Schools, Norway-Vulcan Area Schools, North Dickinson County Schools |
| Eaton County | 9 | 15,918 | Grand Ledge Public Schools, Waverly Community Schools, Charlotte Public Schools, Eaton Rapids Public Schools, Olivet Community Schools, Maple Valley Schools, Potterville Public Schools, Bellevue Community Schools, Oneida Township S/D #3 |
| Emmet County | 5 | 4,016 | Public Schools of Petoskey, Harbor Springs School District, Pellston Public Schools, Alanson Public Schools, Mackinaw City Public Schools |
| Genesee County | 21 | 49,786 | All 21 Genesee County districts → |
| Gladwin County | 2 | 2,529 | Gladwin Community Schools, Beaverton Schools |
| Gogebic County | 4 | 1,524 | Ironwood Area Schools of Gogebic County, Bessemer Area School District, Wakefield-Marenisco School District, Watersmeet Township School District |
| Grand Traverse County | 2 | 10,014 | Traverse City Area Public Schools, Kingsley Area Schools |
| Gratiot County | 6 | 5,058 | Alma Public Schools, Ithaca Public Schools, St. Louis Public Schools, Breckenridge Community Schools, Fulton Schools, Ashley Community Schools |
| Hillsdale County | 8 | 4,690 | Hillsdale Community Schools, Jonesville Community Schools, Reading Community Schools, Camden-Frontier School, Pittsford Area Schools, North Adams-Jerome Public Schools, Litchfield Community Schools, Waldron Area Schools |
| Houghton County | 9 | 4,877 | Houghton-Portage Township School District, Public Schools of Calumet Laurium & Keweenaw, Hancock Public Schools, Adams Township School District, Lake Linden-Hubbell School District, Dollar Bay-Tamarack City Area Schools, Chassell Township School District, Stanton Township Public Schools, Elm River Township School District |
| Huron County | 12 | 4,225 | All 12 Huron County districts → |
| Ingham County | 11 | 34,203 | All 11 Ingham County districts → |
| Ionia County | 7 | 7,205 | Ionia Public Schools, Portland Public Schools, Belding Area School District, Saranac Community Schools, Berlin Township S/D #3, Easton Township S/D #6, Ionia Township S/D #2 |
| Iosco County | 4 | 3,277 | Oscoda Area Schools, Tawas Area Schools, Whittemore-Prescott Area Schools, Hale Area Schools |
| Iron County | 2 | 1,241 | West Iron County Public Schools, Forest Park School District |
| Isabella County | 3 | 5,728 | Mt. Pleasant City School District, Shepherd Public Schools, Beal City Public Schools |
| Jackson County | 12 | 19,882 | All 12 Jackson County districts → |
| Kalamazoo County | 9 | 32,910 | Kalamazoo Public Schools, Portage Public Schools, Gull Lake Community Schools, Vicksburg Community Schools, Comstock Public Schools, Parchment School District, Schoolcraft Community Schools, Galesburg-Augusta Community Schools, Climax-Scotts Community Schools |
| Kalkaska County | 3 | 1,880 | Kalkaska Public Schools, Forest Area Community Schools, Excelsior Township S/D #1 |
| Kent County | 20 | 86,671 | All 20 Kent County districts → |
| Keweenaw County | 1 | 5 | Grant Township S/D #2 |
| Lake County | 1 | 442 | Baldwin Community Schools |
| Lapeer County | 5 | 10,129 | Lapeer Community Schools, North Branch Area Schools, Imlay City Community Schools, Almont Community Schools, Dryden Community Schools |
| Leelanau County | 4 | 1,774 | Glen Lake Community Schools, Suttons Bay Public Schools, Leland Public School District, Northport Public School District |
| Lenawee County | 11 | 13,811 | All 11 Lenawee County districts → |
| Livingston County | 5 | 22,276 | Howell Public Schools, Brighton Area Schools, Hartland Consolidated Schools, Fowlerville Community Schools, Pinckney Community Schools |
| Luce County | 1 | 497 | Tahquamenon Area Schools |
| Mackinac County | 6 | 1,036 | St. Ignace Area Schools, Engadine Consolidated Schools, Les Cheneaux Community Schools, Moran Township School District, Mackinac Island Public Schools, Bois Blanc Pines School District |
| Macomb County | 21 | 104,241 | All 21 Macomb County districts → |
| Manistee County | 4 | 2,335 | Manistee Area Public Schools, Kaleva Norman Dickson School District, Onekama Consolidated Schools, Bear Lake Schools |
| Marquette County | 8 | 7,568 | Marquette Area Public Schools, Negaunee Public Schools, NICE Community School District, Gwinn Area Community Schools, Ishpeming Public School District No. 1, Republic-Michigamme Schools, Powell Township Schools, Wells Township School District |
| Mason County | 3 | 3,605 | Ludington Area School District, Mason County Central Schools, Mason County Eastern Schools |
| Mecosta County | 3 | 5,166 | Big Rapids Public Schools, Chippewa Hills School District, Morley Stanwood Community Schools |
| Menominee County | 5 | 2,792 | Menominee Area Public Schools, Bark River-Harris School District, Stephenson Area Public Schools, North Central Area Schools, Carney-Nadeau Public Schools |
| Midland County | 4 | 10,986 | Midland Public Schools, Bullock Creek School District, Meridian Public Schools, Coleman Community Schools |
| Missaukee County | 2 | 2,223 | Lake City Area School District, McBain Rural Agricultural Schools |
| Monroe County | 10 | 19,885 | All 10 Monroe County districts → |
| Montcalm County | 6 | 8,064 | Greenville Public Schools, Central Montcalm Public School, Lakeview Community Schools (Montcalm), Vestaburg Community Schools, Montabella Community Schools, Carson City-Crystal Area Schools |
| Montmorency County | 2 | 679 | Hillman Community Schools, Atlanta Community Schools |
| Muskegon County | 11 | 23,279 | All 11 Muskegon County districts → |
| Newaygo County | 6 | 6,756 | Fremont Public School District, Newaygo Public School District, Grant Public School District, White Cloud Public Schools, Hesperia Community Schools, Big Jackson School District |
| Oakland County | 27 | 153,693 | All 27 Oakland County districts → |
| Oceana County | 4 | 2,725 | Hart Public School District, Shelby Public Schools, Walkerville Public Schools, Pentwater Public School District |
| Ogemaw County | 1 | 1,844 | West Branch-Rose City Area Schools |
| Ontonagon County | 2 | 441 | Ontonagon Area School District, Ewen-Trout Creek Consolidated School District |
| Osceola County | 4 | 3,535 | Reed City Area Public Schools, Pine River Area Schools, Evart Public Schools, Marion Public Schools |
| Oscoda County | 2 | 808 | Mio-AuSable Schools, Fairview Area School District |
| Otsego County | 3 | 3,494 | Gaylord Community Schools, Johannesburg-Lewiston Area Schools, Vanderbilt Area Schools |
| Ottawa County | 9 | 39,829 | West Ottawa Public School District, Hudsonville Public School District, Zeeland Public Schools, Grand Haven Area Public Schools, Jenison Public Schools, Holland City School District, Allendale Public Schools, Coopersville Area Public School District, Spring Lake Public Schools |
| Presque Isle County | 3 | 1,155 | Onaway Area Community School District, Rogers City Area Schools, Posen Consolidated School District No. 9 |
| Roscommon County | 2 | 1,867 | Houghton Lake Community Schools, Roscommon Area Public Schools |
| Saginaw County | 12 | 23,380 | All 12 Saginaw County districts → |
| Sanilac County | 7 | 5,322 | Croswell-Lexington Community Schools, Sandusky Community School District, Marlette Community Schools, Brown City Community Schools, Deckerville Community School District, Carsonville-Port Sanilac School District, Peck Community School District |
| Schoolcraft County | 1 | 701 | Manistique Area Schools |
| Shiawassee County | 8 | 9,707 | Owosso Public Schools, Corunna Public Schools, Durand Area Schools, Laingsburg Community Schools, Perry Public Schools, New Lothrop Area Public Schools, Byron Area Schools, Morrice Area Schools |
| St. Clair County | 7 | 22,140 | Port Huron Area School District, Anchor Bay School District, East China School District, Marysville Public Schools, Yale Public Schools, Algonac Community School District, Capac Community Schools |
| St. Joseph County | 9 | 9,475 | Sturgis Public Schools, Three Rivers Community Schools, Constantine Public School District, Centreville Public Schools, White Pigeon Community Schools, Colon Community School District, Burr Oak Community School District, Mendon Community School District, Nottawa Community School |
| Tuscola County | 8 | 6,394 | Caro Community Schools, Millington Community Schools, Cass City Public Schools, Vassar Public Schools, Reese Public Schools, Kingston Community School District, Mayville Community School District, Akron-Fairgrove Schools |
| Van Buren County | 12 | 14,057 | All 12 Van Buren County districts → |
| Washtenaw County | 8 | 35,781 | Ann Arbor Public Schools, Saline Area Schools, Ypsilanti Community Schools, Lincoln Consolidated School District, Dexter Community School District, Chelsea School District, Whitmore Lake Public School District, Manchester Community Schools |
| Wayne County | 33 | 199,654 | All 33 Wayne County districts → |
| Wexford County | 4 | 5,010 | Cadillac Area Public Schools, Manton Consolidated Schools, Mesick Consolidated Schools, Buckley Community Schools |
