Jan Jansen may refer to:
Jan Jansen (cyclist) (born 1945), Dutch cyclist Jan Jansen (historian) (born 1962), Dutch historian Jan B. Jansen (1898–1984), Norwegian professor of medicine Jan K. S. Jansen (1931–2011), Norwegian professor of medicine Jan Helge Jansen (born 1937), Norwegian politician Jan Jansen, a Baldur's Gate character
See also Jan Jansohn, guitarist "Yon Yonson", a children's rhyme Jan Janszoon (c. 1570–1641), Dutch pirate Jan Janssen (disambiguation) Jan Jansson (disambiguation)