| Jackie Hennessy | |
| Fullname: | John Hennessy |
| Birth Date: | 1940 10, df=y |
| Position: | Utility |
| Youthyears1: | 1956–1957 |
| Youthclubs1: | Manchester United |
| Years1: | 1958 |
| Clubs1: | Cork Hibernians |
| Caps1: | 2 |
| Goals1: | 2 |
| Years2: | 1958–1966 |
| Clubs2: | Shelbourne |
| Caps2: | 150 |
| Goals2: | 39 |
| Years3: | 1966 |
| Clubs3: | Derry City |
| Caps3: | ? |
| Goals3: | ? |
| Years4: | 1966–1969 |
| Caps4: | 49 |
| Goals4: | 4 |
| Years5: | 1969–1970 |
| Clubs5: | South Coast United |
| Caps5: | ? |
| Goals5: | ? |
| Years6: | 1970–1972 |
| Clubs6: | Derry City |
| Caps6: | ? |
| Goals6: | ? |
| Nationalyears1: | 1964–1968 |
| Nationalteam1: | Republic of Ireland |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 1960 |
| Nationalteam2: | Republic of Ireland B |
| Nationalcaps2: | 1 |
| Nationalgoals2: | 2 |
Jackie Hennessy was an Irish footballer who played with St. Patrick's Athletic, Shelbourne and Derry City during his career. He also earned 5 international call-ups to the Republic of Ireland team,[1] debuting during the 1965-66 League of Ireland season against West Germany.[2] In 1960, he scored twice on his only Republic of Ireland B appearance. In 1962 Hennessy scored Shelbourne's first ever goal in European Competition in the 1962-63 European Cup against Sporting CP.