Hans Kennert Mattias Hedarv Karlsson (born 17 August 1977) is a Swedish politician, writer and public commentator who served as Leader of the Sweden Democrats in the Riksdag from September 2014 to November 2019. He has been a Member of the Riksdag (SD) since October 2010. He previously served as temporary Leader of the Sweden Democrats from 2014 to 2015.
