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| No. 421 (Red Indian) Squadron RCAF | |
|---|---|
 | |
| Active | 9 April 1942 to 1945 15 September 1949 to 31 August 1992 |
| Country |  Canada |
| Branch | .svg){kind=small} Royal Canadian Air Force and Royal Canadian Artillery |
| Type | Article XV squadron |
| Part of | unit of the Royal Canadian Air Force, |
| Nickname(s) | Red Indian |
| Motto(s) | Bellicum Cecinere |
| Battle honours | Defence of Britain 1942-43, Fortress Europe 1942-44, France and Germany 1944-45, Normandy 1944 Arnhem Rhine |
| Aircraft flown | |
| Fighter | Supermarine Spitfire de Havilland Vampire Canadair Sabre Canadair CF-104 Starfighter McDonnell Douglas CF-18 Hornet |
No. 421 Squadron RCAF was a unit of the Royal Canadian Air Force. It was the last RCAF fighter squadron to be formed in the UK during World War II.