He received a gold medal in sprint at the 2004 World Orienteering Championships, and gold medal in relay in 2003, as a member of the Swedish winning team. He received bronze medals in relay at the 2004 and 2006 world championships, and a gold medal in relay at the European Orienteering Championships in 2006.
- (Swedish) Niclas Jonasson's home site
- (Swedish) Niclas Jonasson, Leksands OK – Svenska Orienteringsförbundet (Retrieved on July 7, 2008)
- World Orienteering Championship, senior statistics 1966-2006 (Retrieved on December 30, 2007)
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