Dennis Kelleher (20 November 1918 – 20 February 2002) was an Irish footballer who represented Great Britain at the 1948 Summer Olympics.
Dennis played amateur football with Barnet, winning the FA Amateur Cup in 1946; he also earned 8 amateur caps for Ireland.
Kelleher also represented touring team Middlesex Wanderers.During World War II, Kelleher served as a Lieutenant in the Royal Naval Volunteer Reserve, and was captured while serving in Egypt, later escaping from a German prisoner-of-war camp.