Sundin is a Swedish surname. It is derived from the Swedish noun sund, strait.
Notable people with the surname include:
Andreas Sundin, professional Swedish ice hockey player Carl Sundin, Swedish sprint canoer David Sundin, Swedish comedian and television presenter Erik Sundin, Swedish football player Fredrik Sundin, professional Swedish ice hockey player Mats Sundin, Swedish professional ice hockey player Michael Sundin (1961–1989), English television presenter, actor, dancer and trampolinist Niklas Sundin, Swedish guitarist of Dark Tranquillity Per Sundin (born 1963), Swedish music executive Robin Sundin, Swedish Bandy player Ronnie Sundin, retired Swedish professional ice hockey defenseman