Stian Thomassen

Stian Thomassen (born 8 August 1977) is a retired Norwegian football defender.

He came through the youth ranks of Lillestrøm SK and was drafted into the first team in 1996. He also represented Norway as a youth and under-21 international. Playing 27 Lillestrøm league games over three seasons, he spent 1998 on loan to FK Haugesund. He left the top tier to play three seasons for HamKam, four for Nybergsund and one for Ull/Kisa. He played a game on trial for Grimsby in 2001 during their preseason in Sweden.