|Full name||John Hennessy|
|1966–1969||St. Patrick's Athletic||49||(4)|
|1969–1970||South Coast United||?||(?)|
|1964-1968||Republic of Ireland||5||(0)|
|1960||Republic of Ireland B||1||(2)|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
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, debuting during the 1965-66 League of Ireland season against West Germany. 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.