| Abbreviation | Definition |
|---|---|
| MCCK | Metropolitan Community Church of Knoxville |
| MCCP | Metropolitan Community Church of Philadelphia |
| MCCR | Metropolitan Community Church of the Rockies |
| MCCS | Members of Churches of Christ for Scouting |
| MCCS | Members of the Churches of Christ for Scouting |
| MCEF | Mechanicsville Churches Emergency Functions |
| MCGI | Members Church of God |
| MCGI | Members Church of God International |
| MCGI | Members of the Church Of God |
| MCIF | Missionary Church Investment Foundation |
| MCMA | Minnesota Church Ministries Association |
| MCMC | Martins Creek Mennonite Church |
| MCOB | Middlebury Church of the Brethren |
| MCOC | Memorial Church Of Christ |
| MCSA | Methodist Church of Southern Africa |
| MCSL | Manassas Church Softball League |
| MCSL | Methodist Church in Sierra Leone |
| MCSL | Methodist Church Sierra Leone |
| MDBC | Mount Dora Baptist Church |
| MDCC | Metro Detroit Christian Church |