| Abbreviation | Definition |
|---|---|
| MCEA | Metropolitan Committee for Education on Alcoholism |
| MCEC | Military Child Education Coalition |
| MCF | McCarty Cancer Foundation |
| MCF | Michigan Cancer Foundation |
| MCF | Minnesota Council on Foundations |
| MCFL | Michigan Christians For Life |
| MCHC | Maternal Child Health Coalition |
| MCHC | Metropolitan Chicago Healthcare Council |
| MCHF | Marine Corps Heritage Foundation |
| MCHS | Methodist Children's Home Society |
| MCHS | Montgomery County Humane Society |
| MCI | Mexican Cultural Institute |
| MCIL | Monroe Center for Independent Living |
| MCIVCC | Monroe County Interfaith Volunteer Caregivers Coalition |
| MCJJR | Michigan Collaborative for Juvenile Justice Reform |
| MCL | Marine Corps League |
| MCLEF | Marine Corps - Law Enforcement Foundation |
| MC-LEF | Marine Corps - Law Enforcement Foundation |
| MCLEFI | Marine Corps - Law Enforcement Foundation, Inc. |
| MC-LEFI | Marine Corps - Law Enforcement Foundation, Inc. |