91st Battalion (Elgin), CEF
| 91st "Overseas" Battalion, CEF | |
|---|---|
| Active | 1915–1916 |
| Disbanded | 21 May 1917 |
| Country | Canada |
| Branch | Canadian Expeditionary Force |
| Type | Infantry |
| Mobilization headquarters | St. Thomas, Ontario |
| Motto(s) | Duty first |
| Battle honours | The Great War, 1916 |
| Commanders | |
| Officer commanding | LCol W.J. Green |
The 91st Battalion (Elgin), CEF, was an infantry battalion of the Great War Canadian Expeditionary Force.