| Abbreviation | Definition |
|---|---|
| MCJC | McHenry County Jewish Congregation |
| MCLC | Master Christian Life Coach |
| MCLF | Mennonite Christian Leadership Foundation |
| MCM | Midnight Cry Ministries |
| MCMC | Muslim Center of Middlesex County |
| MCMF | Montgomery County Muslim Foundation |
| MCMS | Montrose Christian Montessori School |
| MCNC | Muslim Community of Nassau County |
| MCOB | Mennonite Congregation of Boston |
| MCPC | Montreal Chinese Pentecostal Church |
| MCPS | Montgomery Catholic Preparatory School |
| MCR | My Catholic Regret |
| MCRC | Mennonite Congregational Resource Center |
| MCRC | Muslim Civil Rights Center |
| MCRC | Muslim Community Resource Center |
| MCRG | Muslim Community Reference Group |
| MCS | Maryville Christian School |
| MCSH | Missionary Catechists of the Sacred Heart |
| MCSM | Montague Catholic Social Ministries |
| MCSP | Moravian Church, Southern Province |