Oulu (Swedish: Uleåborg) is one of the 13 electoral districts of the Parliament of Finland, the national legislature of Finland. The district was established as Oulu Province South (Finnish: Oulun läänin eteläinen vaalipiiri; Swedish: Uleåborgs läns södra valkrets)[4] in 1907 when the Diet of Finland was replaced by the Parliament of Finland. It was renamed Oulu Province (Finnish: Oulun lääni; Swedish: Uleåborgs län) in 1939 and Oulu in 1997. It is conterminous with the regions of Kainuu and North Ostrobothnia. The district currently elects 18 of the 200 members of the Parliament of Finland using the open party-list proportional representation electoral system. At the 2023 parliamentary election it had 393,643 registered electors.