John Gilligan

John or Jack Gilligan may refer to:

• John Gilligan (criminal) (born 1952), Irish criminal
• John J. Gilligan (1921–2013), Governor of Ohio
• John Gilligan (footballer, born 1957), footballer for Swindon Town and Sligo
• John Gilligan (footballer, born 1884) (1884–1946), Scottish footballer for Clyde
• John Gilligan (mayor), independent councilor and former mayor of Limerick, 2008–2009
• John Gilligan (hurler), Irish hurler and footballer
• John Joseph Gilligan Jr. (1923–1942), United States Marine
• Jack Gilligan (baseball) (1885–1980), Major League Baseball pitcher