| 43rd Royal Tank Regiment | |
|---|---|
| Active | 1938–1956 |
| Disbanded | 1956 |
| Country |  United Kingdom |
| Branch |  British Army |
| Type | Armoured Regiment |
| Role | Specialised Armour |
| Part of | Royal Armoured Corps |
The 43rd (6th (City) Battalion, The Royal Northumberland Fusiliers) Royal Tank Regiment (43 RTR) was an armoured regiment of the British Army's Royal Armoured Corps that tested and demonstrated specialised Armoured Fighting Vehicles during World War II.