9 Anti-Aircraft Z Regiment RA was formed in January 1941 with four batteries in 8 Anti-Aircraft Division at Clifton. The Regiment disbanded in April 1945.
| Jan 41 | Formed | Clifton, Bristol, UK |
| Jan 41 | 60 Anti-Aircraft Brigade, 8 Anti-Aircraft Division | Cornwall, UK |
| Dec 41 | 55 Anti-Aircraft Brigade, 8 Anti-Aircraft Division | Cornwall, UK |
| Oct 42 | 3 Anti-Aircraft Group | UK |
| Apr 44 | Became 9 Anti-Aircraft Area Mixed Regiment | Clifton, Bristol, UK |
| Apr 45 | Disbanded |
Batteries
| Jan 41 | 141, 142, 143, 144 |
| Oct 41 | 141, 142, 143, 144, 182 |
| Oct 42 | 141, 144, 182, 210, 215 |
| Sep 43 | 141, 142, 144, 182, 210, 215 |
| Apr 44 | 141, 182, 210, 215 |
Batteries manned by Home Guard
| Battery | Home Guard Unit | Date from |
| 141 Battery | 101 City of Bristol | Nov 42 |
| 144 Battery | 102 Gloucestershire (Mixed) | Nov 42 |
| 182 Battery | 102 City of Bristol (Mixed) | Nov 42 |
| 210 Battery | 103 City of Bristol (Mixed) | Jul 42 |
| 215 Battery | 104 City of Bristol (Mixed) | Aug 42 |
Gun Sites Occupied
141 Battery
| Dates | Gun Site | Gun Defended Area |
| Jun 42 | Z1 Easton in Gordano | Bristol |
144 Battery
| Dates | Gun Site | Gun Defended Area |
| Jun 42 | Z2 Bishopsworth | Bristol |
210 Battery
| Dates | Gun Site | Gun Defended Area |
| Jun 42 | Brislington | Bristol |
215 Battery
| Dates | Gun Site | Gun Defended Area |
| 1942 | Z6 Abbots Leigh | Bristol |