John Dempsey
John Dempsey may refer to:
Sports
- John Dempsey (footballer, born 1946), Republic of Ireland international football player
- John Dempsey (footballer, born 1951), Tranmere Rovers player
- John Dempsey (umpire), New Zealand cricket umpire
Politicians
- John J. Dempsey, American politician, governor of New Mexico
- John N. Dempsey, American politician, governor of Connecticut
Others
- John Dempsey (lyricist), also playwright
- John Dempsey (Medal of Honor), American sailor and Medal of Honor recipient
- John Church Dempsey, English portrait artist