Reykjavík North (Icelandic: Reykjavík norður) is one of the six multi-member constituencies of the Althing, the national legislature of Iceland. The constituency was established in 2003 when the existing Reykjavík constituency was split into two. The constituency currently elects nine of the 63 members of the Althing using the open party-list proportional representation electoral system. At the 2021 parliamentary election it had 45,361 registered electors.