Dahlin is a Swedish surname. The name can also be spelled Dalin. Both surnames are derived from the Swedish word dal which means valley. Notable people with the surname include:
Anders J. Dahlin (born 1975), Swedish tenor and opera singerBo Dahlin (born 1948), Swedish professor of education at Karlstad UniversityDavid C. Dahlin (1917–2003), American physician-pathologistErik Dahlin (born 1989), Swedish footballerIsak Dahlin (born 1987), Swedish footballerJacob Dahlin (1952–1991), Swedish TV- and radio-hostJohan Dahlin (born 1986), Swedish football goalkeeperJohn Dahlin (1886–1927), Swedish track and field athleteKjell Dahlin (born 1963), Swedish ice hockey forwardMarcus Dahlin (born 1982), Swedish footballer, a defenderMarienette Dahlin (born 1953), Swedish actress.Martin Dahlin (born 1968), Swedish footballer, now sports agentOlof von Dalin (1708–1763), Swedish poetPeter Dahlin (author), Swedish authorPeter Dahlin (activist), Swedish human right activist