| Houghton County Electric | Houghton | MI |
| Houghton Flour Mill | Houghton | MI |
| Houghton School | Saginaw | MI |
| Howell High School | Howell | MI |
| Howell Plastics | Howell | MI |
| Howell Schools | Howell | MI |
| Howmet | Muskegon | MI |
| Howmet | Whitehall | MI |
| H.S. Robinson & Burtenshaw | Detroit | MI |
| Hua Shan | Bay City | MI |
| Huber | Detroit | MI |
| Hudson Die Cast | Hudson | MI |
| Hudson Motor | Detroit | MI |
| Huetteman & Cramer | Detroit | MI |
| Humbodlt Mining | Humboldt Mine | MI |
| Hurley Hospital | Flint | MI |
| Huron Boiler Setting | Kalamazoo | MI |
| Huron Memorial Hospital | Bad Axe | MI |
| Huron Milling | Harbor Beach | MI |
| Huron Portland Cement | Southfield | MI |
| Huron Portland Cement | Alpena | MI |
| Husite Engineering | Detroit | MI |
| Huss Ontonagon Pulp & Paper | Ontonagon | MI |
| Hydralic Power Systems | Oak Park | MI |
| Hydro-Blast | Detroit | MI |
| Hydro-Blast | Dearborn | MI |
| Hygeia Filter | Detroit | MI |
| Ideal Castings | Albion | MI |
| Ideal Finishing | Lansing | MI |
| Iles Manufacturing | Niles | MI |
| Ima Sports Arena | Flint | MI |
| Incinerator Plant | Detroit | MI |
| Indiana Michigan Power | Bridgman | MI |
| Industrial Brown Hoist | Bay City | MI |
| Industrial Firebrick | Grand Rapids | MI |
| Industrial Firebrick | Kalamazoo | MI |
| Industrial Furnace | Livonia | MI |
| Industrial Insulation | Bay City | MI |
| Industrial Metal Fabricators | Detroit | MI |
| Industrial Piping & Engineering | Coldwater | MI |
| Industrial Service & Engineering | Brooklyn | MI |
| Industrial Tectonics | Ann Arbor | MI |
| Industrial Welding | Lansing | MI |
| Industrial Works | Bay City | MI |
| Ingham Medical Center | Lansing | MI |
| Inland Fisher Guide | Livonia | MI |
| Institute Of Arts, South Wing | Detroit | MI |
| Insulation | Jackson | MI |
| Insulation Services | Bay City | MI |
| Intermediate School | Muskegon | MI |
