| Jack Dempsey | |
| Irish: | Seán Ó Díomasaigh |
| Occupation: | Saddler |
| Sport: | Gaelic football |
| Code: | Football |
| County: | Dublin |
| Province: | Leinster |
| Club: | Bray Emmets |
| Clcounty: | 1 |
| Counties: | Dublin |
| Icyears: | 1902-1907 |
| Icprovince: | 4 |
| Icallireland: | 3 |
| Birth Place: | Ballinastraw, County Wexford, Ireland |
| Death Place: | Ballinastraw |
| Birth Date: | 1878 |
| Death Date: | 10 December 1913 (aged 35) |
Jack Dempsey (1878 – 10 December 1913) was an Irish Gaelic footballer. His championship career at senior level with the Dublin county team lasted six seasons from 1902 until 1907.[1]
In spite of being a native of County Wexford, Dempsey enjoyed his greatest club success as a member of the Bray Emmets club. He won his sole county senior championship medal in 1901.
Dempsey made his debut on the inter-county scene as a member of the Dublin senior football team during the 1902 championship. Over the course of the next six seasons, he won three All-Ireland medals, beginning with a lone victory as captain of the team in 1902, followed by back-to-back championships in 1906 and 1907. Demspey also won four Leinster medals.
Dempsey died from tuberculosis on 10 December 1913.