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
 * John Joseph Gilligan Jr. (1923–1942), United States Marine
 * Jack Gilligan (baseball) (1885–1980), Major League Baseball pitcher