Arnar Freyr Arnarsson (born 14 March 1996) is an Icelandic handball player for MT Melsungen and the Icelandic national team.
He participated at the 2017 and 2019 World Men's Handball Championships.
At the 2026 European Men's Handball Championship he finished 4th with Iceland, losing to Denmark in the semifinal and Croatia in the third-place playoff.