| Abbreviation | Definition |
|---|---|
| MCA | Monte Carlo Association |
| MCBA | McHenry County Bowling Association |
| MCC | Marlybone Cricket Club |
| MCC | Marylebone Cricket Club |
| MCC | Maxima Club of California |
| MCC | Mecklenburg Cricket Club |
| MCC | Mid-Central Conference |
| MCC | Middlesex Country Cricket |
| MCCC | Middlesex County Cricket Club |
| MCDS | Ministry of Community Development and Sports |
| MCG | Melbourne Cricket Ground |
| MCG | Multiple Coalition Game |
| MCHC | Metropolitan Collegiate Hockey Conference |
| MCL | Members Choice League |
| MCL | Modified Chest Left |
| MCM | Marine Corps Marathon |
| MCO | Motorsport Club of Ottawa |
| MCS | Motor Cross South |
| MCSA | Martin County Sportmen's Association |
| MCSA | Middle Country Sports Association |