Carl Oliver Hagelin (born 23 August 1988) is a Swedish professional ice hockey player for the Washington Capitals of the National Hockey League (NHL).
Hagelin was drafted by the New York Rangers in the sixth round, 168th overall, of the 2007 NHL Entry Draft.
Hagelin has won the Stanley Cup as a member of the Pittsburgh Penguins in 2016 and 2017.
Internationally, Hagelin has won a silver medal with Sweden at the 2014 Winter Olympics.