4 Anti-Aircraft Z Regiment RA was formed in September 1940 with four batteries in 4 Anti-Aircraft Division. 4 Anti-Aircraft Z Regiment RA disbanded in March 1945.
| Sep 40 |  |
Formed 4 Anti-Aircraft Division | |
| Sep 40 | |
4 Anti-Aircraft Division, 33 Anti-Aircraft Brigade | North West England |
| Jul 41 | |
4 Anti-Aircraft Division, 70 Anti-Aircraft Brigade | North West England |
| Oct 41 | |
4 Anti-Aircraft Division, 33 Anti-Aircraft Brigade | North West England |
| Oct 42 |  |
4 Anti-Aircraft Group, 57 Anti-Aircraft Brigade | North West England |
| May 43 | |
4 Anti-Aircraft Group, 33 Anti-Aircraft Brigade Designated “Mixed” |
North West England |
| Apr 44 | |
Became 4 Anti-Aircraft Area Mixed Regiment | North West England |
| Mar 45 | |
5 Anti-Aircraft Group, 33 Anti-Aircraft Brigade | North West England |
| Mar 45 | Disbanded |
Batteries
| Sep 40 | 104, 108, 116, 122 |
| Jan 41 | 104, 108, 122, 132, 135, 139 |
| Aug 41 | 104, 132, 135, 139, 172 |
| Oct 42 | 104, 132, 135, 172, 201, 202 |
| Dec 42 | 104, 108, 122, 132, 135, 230 |
| Nov 43 | 104, 108, 122, 132 |
Batteries manned by Home Guard
| Battery | Home Guard Unit | Date from |
| 104 Battery | 103 Cheshire (Mixed) | Nov 42 |
| 132 Battery | 101 Cheshire (Mixed) | Nov 42 |
| 201 Battery | 102 West Lancs (Mixed) | Jul 42 |
| 202 Battery | 103 West Lancs (Mixed) | Jul 42 |