Sebastian Karlsson (born September 19, 1986 in Gothenburg, Sweden) is a professional Swedish ice hockey player.

On November 5, 2011, Sebastian Karlsson hit former Frölunda HC teammate Magnus Kahnberg to the head in an away game between Karlsson's Linköping and Kahnberg's Frölunda.

The hit resulted in Kahnberg being hospitalised with a severe concussion, a deep forehead laceration, and several teeth knocked out.

He also missed the entire 2011 European Trophy playoffs as a result, because Elitserien suspensions also cover ice hockey in general and thus are not limited to the Elitserien league (the suspension expires after December 20, 2011).

This biographical article relating to a Swedish ice hockey winger is a stub.