Ballyjamesduff
| Ballyjamesduff Baile Shéamais Dhuibh | |
|---|---|
| Town | |
| Market Street | |
| Coordinates: 53°51′51″N 7°12′20″W / 53.86422°N 7.205572°W | |
| Country | Ireland | 
| Province | Ulster | 
| County | County Cavan | 
| Elevation | 104 m (341 ft) | 
| Population  (2022) | 2,917 | 
| Eircode routing key | A82 | 
| Telephone area code | +353(0)49 | 
| Irish Grid Reference | N520906 | 
Ballyjamesduff (Irish: Baile Shéamais Dhuibh) is a town in County Cavan, Ireland. A former market town, it was the winner of the 1966 and 1967 Irish Tidy Towns Competition.