| East Devon Militia 1st Devon Militia 4th (1st Devon Militia) Battalion, Devonshire Regiment 3rd (Reserve) Battalion, Devonshire Regiment | |
|---|---|
 Badge of the East Devon Militia, later adopted as the cap badge of the Devonshire Regiment | |
| Active | 5 December 1758–1 April 1953 |
| Country |  Kingdom of Great Britain (1758–1800) United Kingdom (1801–1953) |
| Branch |  Militia |
| Role | Infantry |
| Garrison/HQ | Exeter Castle Topsham Barracks, Exeter |
| Motto(s) | Semper Fidelis (Ever faithful) |
| Commanders | |
| Notable commanders | John Dyke Acland John Pollexfen Bastard |
The 1st or East Devon Militia, later the 3rd Battalion, Devonshire Regiment, was a part-time military unit in the maritime county of Devonshire in the West of England. The Militia had always been important in the county, which was vulnerable to invasion, and from its formal creation in 1758 the regiment served in home defence in all of Britain's major wars until 1908, after which it became a reserve unit for the Devonshire Regiment.