Sweden–NATO relations

Sweden and the North Atlantic Treaty Organization (NATO) have a close relationship and regularly carry out joint exercises, cooperate in peacekeeping operations, and share information. Sweden is one of five members of the European Union that are not members of NATO. Sweden joined the Partnership for Peace on 9 May 1994.

Historically, a minority of the Swedish population has been in favour of NATO membership, but the question of membership rose in popularity following the 2022 Russian invasion of Ukraine, and Sweden applied to join the organisation on 18 May 2022. On 5 July 2022, NATO signed the accession protocol for Sweden to join the alliance, which was quickly ratified by almost all states by September. While it has not yet received the requisite unanimous ratification to be an official member, it has been described as woven into the alliance in all but name. NATO Secretary-General Jens Stoltenberg said in March 2023 it was "inconceivable" NATO would not assist Sweden if the latter's security were threatened. Only Hungary has yet to ratify Sweden's NATO bid, but has indicated that it will do so.