23 Anti-Aircraft Brigade was formed in Ceylon (Sri Lanka) in July 1942. It took over responsibility for the Colombo area from the 1 Royal Marine AA Brigade who now covered the eastern side of Ceylon. The Marines were later replaced by 24 AA Brigade. 23 Anti-Aircraft Brigade was disbanded sometime before August 1945.
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| Jul 42 | Colombo, Ceylon (Sri Lanka) |  | Ceylon Command |
| By Aug 45 | Disbanded | | |
Order of Battle November 1942
| 52 (London) Heavy Anti-Aircraft Regiment (155, 159, 271 Batteries) |
| 65 (The Manchester Regiment) Heavy Anti-Aircraft Regiment (181, 183, 196 Batteries) |
| 2 Heavy Anti-Aircraft Regiment (5, 6, 8 Batteries) Ceylon Garrison Artillery |
| 23 Light Anti-Aircraft Regiment (73, 74, 130 Batteries) |
| 43 Light Anti-Aircraft Regiment (147, 148, 264 Batteries) |
| 315 Searchlight Battery |
Order of Battle October 1943
| 52 (London) Heavy Anti-Aircraft Regiment (155, 159, 271 Batteries) |
| 65 (The Manchester Regiment) Heavy Anti-Aircraft Regiment (181, 183, 196 Batteries) |
| 2 Heavy Anti-Aircraft Regiment (5, 6, 8 Batteries) Ceylon Garrison Artillery |
| 23 Light Anti-Aircraft Regiment (73, 74, 130 Batteries) |
| 43 Light Anti-Aircraft Regiment (147, 148, 264 Batteries) |
| 7 Light Anti-Aircraft Battery Ceylon Garrison Artillery |
| 315 Searchlight Battery |
| 9 Searchlight Battery Ceylon Garrison Artillery |
Order of Battle June 1944
| 52 (London) Heavy Anti-Aircraft Regiment (155, 159, 271 Batteries) |
| 13 Indian Heavy Anti-Aircraft Regiment (37, 38, 39 Batteries) Indian Artillery |
| 76 Light Anti-Aircraft Regiment (226, 227, 228 Batteries) |
| 3 Searchlight/Light Anti-Aircraft Regiment Ceylon Garrison Artillery |
| 315 Searchlight Battery |
| 9 Searchlight Battery Ceylon Garrison Artillery |
