| Abbreviation | Definition |
|---|---|
| MCA | Maneuver Control Agency |
| MCA | Marine Corps system Applications |
| MCA | Maximum Calling Area |
| MCA | MCS Applications |
| MCA | Military Civic Action |
| MCA | Military Commissions Act |
| MCA | Military Construction Army |
| MCA | Military Construction, Army |
| MCA | Mission Concept Approval |
| MCA | Mobile Combat Armor |
| MCA | Monthly Civil Accounts |
| MCA | Movement Control Agency |
| MCAG | Maritime Civil Affairs Group |
| MCAGCC | Marine Corps Air Ground Combat Center |
| MCALF | Marine Corps Auxiliary Landing Field |
| MCAP | Maximum Calling Area Precedence |
| MCAPP | Mid-Continent Area Power Pool |
| MCAR | Medium Caliber Assault Rifle |
| MCAR | Military Construction Army Reserve |
| MCAR | Military Construction, Army Reserve |