Arnar Jahrmann Førsund (born 29 July 1986) is a Norwegian footballer who plays for Ørn Horten.

He played on top level for the Norwegian clubs Vålerenga, Sandefjord, Kongsvinger, HamKam and Manglerud Star.

After the 2009 season he and several other players were sacked after rejecting a 70% wage-cut, with the club blaming it on poor economy.

Ahead of the 2013 season he went on to Eidsvold Turn,[3] and moved home to Horten and Ørn-Horten in the summer of 2014.

[5] Four years after retiring, Førsund made a comeback for Ørn Horten in the 2021 Norwegian Football Cup, going on to play in the 2021 3. divisjon for the team.