| Fort Dufferin | |
|---|---|
 Fort Dufferin site with remaining buildings | |
| Etymology | Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava |
| Location | Manitoba, Canada |
| Coordinates | 49°1′50″N 97°12′8″W / 49.03056°N 97.20222°W |
| Founder | Government of Canada |
| Built | 1872 (used until 1879) |
| Designated | 1937 |
Fort Dufferin is a former Canadian government post near the Canada–United States border at Emerson, Manitoba. The fort was used during the 1870s as a base for the North American Boundary Commission and the North-West Mounted Police (NWMP), and as an immigration station. It was designated a national historic site of Canada in 1937.