| Royal 1st Devon Yeomanry | |
|---|---|
| Active | 15 May 1794 – 7 June 1920 |
| Country |  Kingdom of Great Britain (1794–1800) United Kingdom (1801–1920) |
| Branch |  British Army |
| Type | Yeomanry |
| Size | Regiment |
| Garrison/HQ | Exeter |
| Engagements | Second Boer War First World War |
The Royal 1st Devon Yeomanry was a Yeomanry regiment of the British Army. First raised in 1794, it participated in the Second Boer War and the First World War before being amalgamated with the Royal North Devon Yeomanry in 1920 to form the Royal Devon Yeomanry.