66 Light Anti-Aircraft Regiment RA(TA) was formed in December 1940 in Belfast, with two batteries from 102 Heavy Anti-Aircraft Regiment . The Regiment was disbanded April 1945 in the Middle East.
| Dec 40 | Formed from batteries from 102 Heavy Anti-Aircraft Regiment | Belfast, UK |
| Dec 40 | 3 Anti-Aircraft Brigade | UK |
| Jun 42 | 71 Anti-Aircraft Brigade | UK |
| Sep 42 | War Office Reserve | UK |
| Mar 43 | Middle East Forces | N Africa |
| Jun 43 | 8 Army | N Africa |
| Sep 43 | 8 Army | Italy |
| Apr 45 | Disbanded |
Batteries
| Dec 40 | 175, 176 |
| Mar 41 | 175, 176, 251 |
| Sep 41 | 175, 176, 276 |
| Feb 42 | 175, 176, 276, 459 |
| Jul 42 | 175, 176, 276 |
