Fredrik Claesson (born 24 November 1992) is a Swedish professional ice hockey defenseman who is currently an unrestricted free agent. He most recently played with the New York Rangers in the National Hockey League (NHL). He was drafted by the Ottawa Senators in the fifth round (126th overall) of the 2011 NHL draft.
Claesson began playing hockey in Haninge HC, and later moved on to Hammarby IF, to play in Hammarby's youth organization. He also made two appearances in the club's senior team in the Swedish second division league HockeyAllsvenskan, during the 2007–08 season. Claesson moved to Stockholm rival Djurgården for the 2008–09, where he played in Djurgården's J18 and J20 teams. He also represented team Stockholm at the 2008 TV-pucken.
Claesson made his Elitserien debut in the Djurgården's first league game of the season on 16 September 2010 against HV71. He signed a two-year extension with Djurgården in October 2010. He scored his first Elitserien goal on 11 December 2010 away against Modo Hockey.