Date of Birth: 
About Mattias Karlsson (orienteer)
- Mattias Karlsson (born 6 February 1972) is a Swedish orienteering competitor.
- He is Relay World Champion from 2003, as a member of the Swedish winning team in the World Orienteering Championship in Rapperswil-Jona, Switzerland.
- He also has bronze medals from 2004 and 2006 (relay), and obtained silver in the 2004 Long distance World Championships in Västerås, Sweden.
- He is several times Swedish Champion, in 1998 (Long distance), in 1999 (Long distance), in 2002 (both Long distance and Night Orienteering), and in 2006 (Relay).
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