John McGowan

John McGowan may refer to:


 * John McGowan (Medal of Honor) (1831–?), American Civil War sailor and Medal of Honor recipient
 * John McGowan (naval officer) (1843–1915), American Civil War veteran and US Navy rear admiral
 * John McGowan (politician) (1845–1922), Ontario MPP and member of the Canadian House of Commons
 * John Reid McGowan (1872–1912), Australian boxing champion
 * J. P. McGowan (1880–1952), American Hollywood actor and director
 * Jack McGowan (1894–1977), American Broadway writer, performer and producer
 * Jack McGowan (golfer) (1930–2001), American professional golfer
 * John McGowan (footballer) (born 1952), Scottish footballer
 * John McGowan (professor) (born 1953), American academic, Distinguished Professor of the Humanities at the University of North Carolina
 * John W. McGowan, member of the New York State Assembly