Stefan Lassen (born November 1, 1985) is a Danish professional ice hockey defenceman who currently plays for Djurgårdens IF in the Elitserien. Lassen began his career in Danish side Herning Blue Fox where he won the Danish Championship in 2007 and 2008. He also participated in the 2007 and the 2008 World Championships before joining Leksands IF in May 2009. Lassen was named for the Danish team again in the 2010 IIHF World Championship. He scored the game winning goal against USA in the preliminary round.