Date of Birth: 
Place of Birth: Östersund, Jämtland County, Sweden
About Mattias Nilsson
- Mattias Nilsson (born 19 February 1982 in Brunflo, near Östersund) is a former Swedish biathlete.Nilsson retired after the 2010–11 season, announcing on 27 September 2011 his retirement from the sport due to a heart condition.In May 2018, it was announced that he, from the 2018–2019 season, becomes coach for Team Sweden in men's cross-country skiing together with Johan Olsson and Fredrik Uusitalo.
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