| MRCC | Coto 47, Costa Rica 
| Others |
| MRCC | M R Consultants Corporation
| Others |
| MRCC | Mackay Rod and Custom Club
| Others |
| MRCC | Mandurah Rod and Custom Club
| Others |
| MRCC | Maritime Rescue Coordination Centers
| Government, Facility, Oceans and Seas, Organization, Safety |
| MRCC | Matt Ross Community Center
| Others |
| MRCC | Mazda Rotary Club Cyprus
| Others |
| MRCC | Media Research Club of Chicago
| Others |
| MRCC | Medical Regulating Control Center
| Others |
| MRCC | Medical Representatives Certification Commission
| Others |
| MRCC | Memorial Road Church of Christ
| Others |
| MRCC | Metastatic Renal Cell Carcinoma
| Others |
| MRCC | Michigan Regional Council of Carpenters
| Others |
| MRCC | Midwest Radical Culture Corridor (artist and activist coalition)
| Others |
| MRCC | Midwest Regional Climate Center
| Others |
| MRCC | Midwestern Regional Climate Center
| Others |
| MRCC | Mildura Rural City Council
| Others |
| MRCC | Military Rape Crisis Center (Boston, MA; est. 2006)
| Others |
| MRCC | Mission Regional Chamber of Commerce
| Others |
| MRCC | Missouri Regional Certification Committee
| Others |
| MRCC | Missouri Registered City Clerk
| Others |
| MRCC | Missouri River Correctional Center
| Others |
| MRCC | Missouri Rural Crisis Center
| Others |
| MRCC | Modesto Radio Control Club
| Others |
| MRCC | Montana Raptor Conservation Center
| Others |
| MRCC | Movement Report Control Center
| Others |
| MRCC | Multi Region Clock Capable
| Others |
| MRCC | Multi Role Combat Craft
| Others |
| MRCC | Multi-Rate Congestion Control (web multicast transmission protocol)
| Others |
| MRCC | Multi-Reference Coupled Cluster
| Others |
| MRCC | Mumbai Regional Congress Committee
| Others |