| Montana Captive Insurance Association | Business |
| Minnesota Crop Improvement Association | Community |
| McFarland Community Ice Arena | Community |
| Missouri Cannabis Industry Association | Community |
| Michigan Cannabis Industry Association | Community |
| Mississippi Crop Improvement Association | Community |
| Meyerland Community Improvement Association | Community |
| Marine Corps Intelligence Association | Community |
| Mclean County India Association | Community |
| Monmouth County Indian Association | Community |
| Micro Channel Interface Adapter | Computing |
| Merged Clustering Imperialists Algorithm | General |
| Multiport Controller Interface Adapter | General |
| Massachusetts Commission on Indian Affairs | General |
| Modern Completely Insane Anteaters | General |
| Multiple Co Inertia Analysis | General |
| Motion Control and Industrial Applications | General |
| Municipal Construction Inspectors Association | General |
| Mauritius Cane Industry Authority | Governmental |
| Mercer County Improvement Authority | Governmental |
| Morris County Improvement Authority | Governmental |
| Municipal Conflict of Interest Act | Governmental |
| Marine Corps Intelligence Activity | Governmental |
| Missing Children Investigation Agency | Governmental |
| Macdonald–Cartier International Airport | International |
| Mexico City International Airport | International |
| Mactan-Cebu International Airport | International |
| Madera County Independent Academy | Regional |
