| Anderson | Spring Lake | MI |
| Angell School | Ann Arbor | MI |
| Ann Arbor Gas | Ann Arbor | MI |
| Ann Arbor Public Schools | Detroit | MI |
| Anstey Foundry | Stevensville | MI |
| Anthony Wayne School | Detroit | MI |
| Antony & Company | Escanaba | MI |
| Antrim Iron | Mancelona | MI |
| A. O. Smith | Ionia | MI |
| Apartment Complex | Flint | MI |
| Apartments | Manistee | MI |
| Aragon Mine | Norway | MI |
| Arbuckle, Ryan & Company | Baldwin | MI |
| Arbuckle, Ryan & Company | Kalamazoo | MI |
| Arbuckle, Ryan & Company | Lansing | MI |
| Arcadian Copper | Hancock | MI |
| Architectural Systems | Grand Rapids | MI |
| Arctic Cold Storage | Detroit | MI |
| Argonant Realty Division Of General Motors | Detroit | MI |
| Argus Metal Products | Detroit | MI |
| Armstrong Cork & Insulation | Detroit | MI |
| Army Corps Of Engineers | Sault Ste. Marie | MI |
| Arnold Home | Detroit | MI |
| Arrow Metal Products | Detroit | MI |
| Artco | Fraser | MI |
| Artco | Lake Orion | MI |
| Artco | Oxford | MI |
| Arthur B. Homer | River Rouge | MI |
| Arthur Middle School | Detroit | MI |
| Asbestos Speciality | Madison Heights | MI |
| Asbestos Speciality | Detroit | MI |
| Ashland Iron & Mining | Ironwood | MI |
| Associated Spring | Plymouth | MI |
| Atherton East Elementary | Flint | MI |
| Atlantic Mining | Atlantic Mine | MI |
| Atlas Drop Forge | Lansing | MI |
| Atlas Powder | Senter | MI |
| Atlas Powder | Houghton | MI |
| A Tool & Gauge | Detroit | MI |
| AT&T | Grand Rapids | MI |
| Attwood | Lowell | MI |
| August Ziesing | Bay City | MI |
| Aurora Gasoline | Detroit | MI |
| Aurora Gasoline | Muskegon | MI |
| Aurora Iron Mining | Ironwood | MI |
| Aurora Refinery | Muskegon | MI |
| Austin | Detroit | MI |
| Austin | Midland | MI |
| Automatic Products | Detroit | MI |
| Automotive Assembly | Allen Park | MI |
