| Acronym | Definition |
|---|
| MCCC | Mercer County Community College (New Jersey) |
| MCCC | Montgomery County Community College (Pottstown, PA) |
| MCCC | Medina County Career Center (Medina, OH) |
| MCCC | Marie Curie Cancer Care (UK) |
| MCCC | Middlesex County Cricket Club |
| MCCC | Maneuver Captains Career Course (US Army) |
| MCCC | Mennonite Central Committee Canada |
| MCCC | Minnesota Counties Computer Cooperative |
| MCCC | Mayo Clinic Cancer Center (Rochester, MN) |
| MCCC | Missile Combat Crew Commander |
| MCCC | MAGTF (Marine Air-Ground Task Force) Communications Control Center |
| MCCC | Mercer County Career Center (Pennsylvania) |
| MCCC | Mobile Consolidated Command Center |
| MCCC | Michigan Civilian Conservation Corps |
| MCCC | 3-Methylcrotonyl-CoA Carboxylase |
| MCCC | Mid-Coast Community Council |
| MCCC | Maximum Cross-Correlation Coefficient |
| MCCC | Muskogee Community Corrections Center |
| MCCC | Majcom Communication Coordination Center |
| MCCC | Major Command Coordination Center (US Air Force) |
| MCCC | Midland County Circuit Court (Midland, Michigan) |
| MCCC | Manitoba Centennial Centre Corporation (Canada) |
| MCCC | Marine Corps Component Commander |
| MCCC | Mid-County Community Center (Tacoma, WA) |
| MCCC | Melton Centrals Cricket Club (Australia) |
| MCCC | Monroe County Community (Monroe, MI) |
| MCCC | Magnolia Center Church of Christ (Riverside, CA) |
| MCCC | Miraculous Christian Center Church (Houston, TX) |