3rd Civil Affairs Group
| 3rd Civil Affairs Group | |
|---|---|
 | |
| Active | 2012-present |
| Country | United States |
| Allegiance | United States of America |
| Branch | United States Marine Corps |
| Type | Civil Affairs |
| Role | Provide civil-military operations support to I MEF or other MAGTF in order to reduce friction between the civilian population and the MEF or other MAGTF. |
| Part of | Marine Forces Reserve |
3d Civil Affairs Group (3d CAG) is a civil affairs (CA) unit of the United States Marine Corps based at Naval Station Great Lakes, Illinois. It was stood up in 2012, while the former 3rd CAG at Camp Pendleton was reflagged as 1st Civil Affairs Group.