Mats Stefan Waltin (born 7 October 1953) is a Swedish ice hockey coach and former player.

He was a member of the Swedish 1976 Canada Cup and 1981 Canada Cup teams and served as the team captain at the 1980 Olympics[1] and as the Olympic flag bearer for Sweden at the 1984 games.

He was awarded the Stora Grabbars och Tjejers Märke #97 in ice hockey.

[2] Domestically Waltin was awarded the Guldpucken as the best player at the 1976 Swedish Championships; he also won the national title with Djurgårdens in 1983.

He then went abroad, coaching Klagenfurter AC in Austria in 2004–2006, the Slovenian national team in 2007–2008 and Manglerud Star Ishockey in Norway since 2012.