MCCC
- Crossroads League
- Frank Lloyd Wright
- Maneuver Captains Career Course
- Marie Curie Cancer Care
- Marin County Civic Center
- Mayo Clinic Cancer Center
- Mercer County Community College
- Middlesex County Cricket Club
- Midwest Christian College Conference
- Minnesota College Athletic Conference
- Minor Counties Cricket Championship
- Missile combat crew
- Monroe County Community College
- Monte Carlo Country Club
- Montgomery County Community College
- Mount Carmel Catholic College
- Roman numeral
- San Rafael, California