John Jansen may refer to:
Sports
edit- John Jansen (rugby league) (born 1955), Australian rugby league footballer
- John Jansen (water polo) (born 1963), retired water polo player from the Netherlands
- Jon Jansen (born 1976), American football player
Others
edit- John Jansen (politician) (born 1947), former mayor of Chilliwack, BC, and former member of British Columbia Legislative Assembly
- John Jansen (record producer), American recording engineer and music producer
See also
edit- John Janssen (1835–1913), German-born American Roman Catholic bishop in Illinois
- Jonathan Janssen (born 1995), New Zealand basketball player