| IMCA | I M C A International Meteorite Collectors Association 
| Others |
| IMCA | Independent Mental Capacity Advocacy
| Others |
| IMCA | Independent Mental Capacity Advocate
| Others |
| IMCA | Independent Mental Capacity Advocates
| Others |
| IMCA | Independent Mental Capacity Assessor
| Others |
| IMCA | Industrial Macromolecular Crystallography Association
| Others |
| IMCA | Industrial Municipal Cleaning Association
| Others |
| IMCA | Institute and Museum for California Art
| Others |
| IMCA | Institute of Management Consultants and Advisors
| Others |
| IMCA | Insurance Marketing and Communications Association
| Others |
| IMCA | Insurance Marketing Communications Association
| Others |
| IMCA | International Management Centres Association
| Others |
| IMCA | International Marine Contractors Association
| Others |
| IMCA | International Meteorite Collectors Association
| Others |
| IMCA | International Moth Class Association
| Others |
| IMCA | International Motor Contest Association
| Others |
| IMCA | International Music Center of America
| Others |
| IMCA | Investment Management Consultants Association
| Others |
| IMCA | Islamic Movement of Central Asia
| Others |
| IMCA | Isle of Man Cricket Association
| Cricket |