Jan Sandmann (born 3 May 1978 in Burg bei Magdeburg, East Germany) is a German former football player.
He made his debut on the professional league level in the Bundesliga for Hamburger SV on 23 September 2000 when he came on as a substitute in the 67th minute in a game against VfL Wolfsburg. He also played in the UEFA Champions League qualification games against Brøndby IF that season, as well as UEFA Cup matches against A.S. Roma.