Arnar Sigurdsson (born 24 November 1981) is a retired tennis player from Iceland.
Sigurdsson had a career high ATP singles ranking of 703 achieved on 7 May 2007.
He also had a career high ATP doubles ranking of 518 achieved on 8 October 2007.
Sigurdsson represented Iceland at the Davis Cup, where he had a W/L record of 64–31.
He holds the most Davis Cup victories for Iceland and was awarded with the Davis Cup Commitment Award.