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 singer
Bo Dahlin (born 1948), Swedish professor of education at Karlstad University
David C. Dahlin (1917–2003), American physician-pathologist
Erik Dahlin (born 1989), Swedish footballer
Isak Dahlin (born 1987), Swedish footballer
Jacob Dahlin (1952–1991), Swedish TV- and radio-host
Johan Dahlin (born 1986), Swedish football goalkeeper
John Dahlin (1886–1927), Swedish track and field athlete
Kjell Dahlin (born 1963), Swedish ice hockey forward
Marcus Dahlin (born 1982), Swedish footballer, a defender
Marienette Dahlin (born 1953), Swedish actress.
Martin Dahlin (born 1968), Swedish footballer, now sports agent
Olof von Dalin (1708–1763), Swedish poet
Peter Dahlin (author), Swedish author
Peter Dahlin (activist), Swedish human right activist
