| Transit agency | City | Vehicles operated directly | Website |
|---|---|---|---|
| Suburban Mobility Authority for Regional Transportation | Detroit | 259 | Official site |
| Mass Transportation Authority | Flint | 245 | Official site |
| City of Detroit | Detroit | 178 | Official site |
| Capital Area Transportation Authority | Lansing | 119 | Official site |
| Interurban Transit Partnership | Grand Rapids | 113 | Official site |
| Ann Arbor Area Transportation Authority | Ann Arbor | 80 | Official site |
| Bay Area Transportation Authority | Traverse City | 51 | Official site |
| Saginaw Transit Authority Regional Service | Saginaw | 51 | Official site |
| Bay Metropolitan Transit Authority | Bay City | 50 | Official site |
| Huron County Board of Commissioners | Bad Axe | 49 | Official site |
| University of Michigan Parking and Transportation Services | Ann Arbor | 46 | Official site |
| Isabella County Transportation Commission | Mt. Pleasant | 38 | Official site |
| Blue Water Area Transportation Commission | Port Huron | 37 | Official site |
| Cadillac/Wexford Transit Authority | Cadillac | 32 | Official site |
| Marquette County Transit Authority | Marquette | 30 | Official site |
| Clinton Area Transit System | Saint Johns | 29 | Official site |
| Central County Transportation Authority | Kalamazoo | 28 | Official site |
| Thunderbay Transportation Authority | Alpena | 28 | Official site |
| Eaton County Transportation Authority | Charlotte | 27 | Official site |
| Greater Lapeer Transportation Authority | Lapeer | 27 | Official site |
| Livingston County Board of Commissioners | Howell | 27 | Official site |
| Roscommon County Transportation Authority | Houghton Lake | 25 | Official site |
| Harbor Transit Multi-Modal Transportation System | Grand Haven | 24 | Official site |
| St. Joseph County Transportation Authority | Three Rivers | 24 | Official site |
| Clare County Transit Corporation | Harrison | 23 | Official site |
| Lake Erie Transportation Commission | Monroe | 23 | Official site |
| Macatawa Area Express Transportation Authority | Holland | 23 | Official site |
| Manistee County Board of Commissioners | Manistee | 23 | Official site |
| Midland County Board of Commissioners | Midland | 23 | Official site |
| Van Buren County Board of Commissioners | Paw Paw | 23 | Official site |
| Benzie Transportation Authority | Beulah | 20 | Official site |
| City of Battle Creek | Battle Creek | 20 | Official site |
| Charlevoix County Board of Commissioners | Charlevoix | 19 | Official site |
| City of Jackson Transportation Authority | Jackson | 18 | Official site |
| Delta Area Transit Authority | Escanaba | 18 | Official site |
| Gladwin County Board of Commissioners | Gladwin | 18 | Official site |
| Ludington Mass Transportation Authority | Ludington | 18 | Official site |
| Mecosta Osceola Transit Authority | Big Rapids | 18 | Official site |
| Barry County Board of Commissioners | Hastings | 17 | Official site |
| Crawford County Transportation Authority | Grayling | 17 | Official site |
| Shiawassee Area Transportation Agency | Owosso | 17 | Official site |
| Twin Cities Area Transportation Authority | Benton Harbor | 17 | Official site |
| Yates Township | Idlewild | 17 | Official site |
| Antrim County Board of Commissioners | Bellaire | 16 | Official site |
| Kalkaska Public Transit Authority | Kalkaska | 16 | Official site |
| Sanilac County Board of Commissioners | Sandusky | 16 | Official site |
| ALTRAN Transit Authority | Munising | 15 | Official site |
| Caro Transit Authority | Caro | 15 | Official site |
| City of Alma | Alma | 14 | Official site |
| Otsego County Board of Commissioners | Gaylord | 14 | Official site |
| Branch Area Transit Authority | Coldwater | 13 | Official site |
| Cheboygan County Board of Commissioners | Cheboygan | 13 | Official site |
| City of Midland | Midland | 12 | Official site |
| Eastern Upper Peninsula Transportation Authority | Sault Sainte Marie | 12 | Official site |
| Ogemaw County Board of Commissioners | West Branch | 12 | Official site |
| County of Muskegon | Muskegon | 10 | Official site |
| Arenac Public Transit Authority | Twining | 9 | Official site |
| Gogebic County Transit | Ironwood | 9 | Official site |
| City of Ionia | Ionia | 8 | Official site |
| City of Niles | Niles | 8 | Official site |
| Schoolcraft Transit Authority | Manistique | 8 | Official site |
| City of Big Rapids | Big Rapids | 7 | Official site |
| City of Houghton | Houghton | 7 | Official site |
| Interurban Transit Authority | Douglas | 7 | Official site |
| City of Greenville | Greenville | 6 | Official site |
| City of Sault Sainte Marie | Sault Sainte Marie | 6 | Official site |
| Detroit Transportation Corporation | Detroit | 6 | Official site |
| Iosco Transit Corporation | East Tawas | 6 | Official site |
| Sault Ste. Marie Tribe of Chippewa Indians | Sault Sainte Marie | 6 | Official site |
| Hancock, City of | Hancock | 5 | Official site |
| Marshall, City of | Marshall | 5 | Official site |
| Ontonagon County Board of Commissioners | Ontonagon | 5 | Official site |
| City of Belding | Belding | 4 | Official site |
| City of Hillsdale | Hillsdale | 4 | Official site |
| Bay Mills Indian Community | Brimley | 1 | Official site |
| Berrien County Board of Commissioners | Saint Joseph | 0 | Official site |
| Cass County Transportation Authority | Cassopolis | 0 | Official site |
| City of Dowagiac | Dowagiac | 0 | Official site |
| County of Allegan | Allegan | 0 | Official site |
| Lenawee Public Transportation Authority | Adrian | 0 | Official site |
| Michigan Department of Transportation | Lansing | 0 | Official site |
Largest first by vehicles operated directly, as each employer reports it to its federal registry.
Source: Federal Transit Administration, National Transit Database 2024 — Reporter Agency Information. Data captured September 30, 2026.