John or Jack Quinn may refer to:
Politicians and lawyers
- Jack Quinn (politician) (born 1951), Congressman from New York
- John Quinn (New York politician) (1839–1903), Congressman from New York
- Jack Quinn III (born 1978), Assemblyman from Erie County, New York and son of the Congressman
- John Quinn (Missouri politician) (born 1950), Member of the Missouri House of Representatives
- John F. Quinn (born 1963), Massachusetts state representative
- John B. Quinn, American lawyer
- John R. Quinn (politician) (1889–1979), served on the Los Angeles County Board of Supervisors
- Jack Quinn (lawyer) (born 1949), White House counsel, 1995–1996
- John Quinn (collector) (1870–1924), lawyer and collector of manuscripts
- John Quinn (advocate), acting Attorney General of the Isle of Man
Sportsmen
- John Quinn (footballer) (born 1938), English professional footballer, 1959–1976
- Jack Quinn (footballer, born 1874) (1874–1918), Australian footballer with Geelong
- Jack Quinn (footballer, born 1918) (1918–2006), Australian rules footballer with South Melbourne, Richmond and Melbourne
- Jack Quinn (Gaelic footballer), Meath Gaelic football player
- Jack Quinn (Scottish footballer) (1890–?), Scottish footballer
- Johnny Quinn (born 1983), American football wide receiver
- Jonathan Quinn (born 1975), former American football quarterback
- Jack Quinn (baseball) (1883–1946), baseball pitcher
- John Quinn (catcher) (1885–1956), baseball catcher for 1911 Philadelphia Phillies
- John Quinn (baseball executive) (1908–1976), baseball general manager
- John Quinn (umpire) (1897–1968), baseball umpire
- John Quinn (wrestler) (born 1944), retired Canadian professional wrestler
Other occupations
- John Quinn (physicist) (born 1933), American theoretical physicist
- John A. Quinn (born 1932), professor of chemical and biomolecular engineering
- John M. Quinn (born 1945), Roman Catholic bishop
- John R. Quinn (born 1929), Roman Catholic archbishop
- Jonny Quinn (born 1972), drummer for Snow Patrol
- John Quinn (broadcaster) (born 1941), Irish writer and broadcaster
- John Quinn (diplomat) (1919–1961), Australian diplomat
Characters
- John Quinn, character in The Southern Vampire Mysteries
- Jack Quinn, character in the 1997 action film Double Team
- John Quinn, a minor antagonist in the seventh season of 24