| 1 Anti-Aircraft Group | |
|---|---|
| Active | October 1942–March 1955 |
| Country |  United Kingdom |
| Branch | &sq=&lang=&file=File:Flag_of_the_British_Army.svg){kind=small} British Army |
| Type | Anti-Aircraft Group |
| Role | Air Defence |
| Part of | Anti-Aircraft Command |
| Garrison/HQ | Stanmore |
| Engagements | Baby Blitz Operation Diver |
| Commanders | |
| Notable commanders | Maj-Gen Erroll Tremlett Maj-Gen Roger Reynolds Maj-Gen William Revell-Smith |
1st Anti-Aircraft Group (1 AA Group) was a formation created by the British Army's Anti-Aircraft Command in 1942 to control anti-aircraft (AA) units defending London against Luftwaffe attacks during World War II. It continued this role into the Cold War until disbandment in 1955.