John McGowan
John McGowan may refer to:
- John McGowan (Medal of Honor), American Civil War sailor and Medal of Honor recipient
- John McGowan (naval officer), American Civil War veteran and US Navy rear admiral
- John McGowan (playwright), American Broadway writer, performer and producer
- John McGowan (politician), Ontario MPP and member of the Canadian House of Commons
- John Reid McGowan, Australian boxing champion
- J. P. McGowan, American Hollywood actor and director
- Jack McGowan (golfer), American professional golfer
- John McGowan (footballer), Scottish footballer
- John McGowan (professor), American academic, Distinguished Professor of the Humanities at the University of North Carolina
- John W. McGowan, member of the New York State Assembly