The Alliance Party of Northern Ireland (APNI), or simply Alliance, is a liberal and centrist political party in Northern Ireland. Following the 2022 Northern Ireland Assembly election, it was the third-largest party in the Northern Ireland Assembly, holding seventeen seats, and broke through by placing third in first preference votes in the 2019 European Parliament election and polling third-highest regionally at the 2019 UK general election. The party won one of the three Northern Ireland seats in the European Parliament, and one seat, North Down, in the House of Commons, the lower house of the Parliament of the United Kingdom.

The 2022 Northern Ireland Assembly election was held on 5 May 2022. It elected 90 members to the Northern Ireland Assembly. It was the seventh assembly election since the establishment of the assembly in 1998. The election was held three months after the Northern Ireland Executive collapsed due to the resignation of the First Minister, Paul Givan of the Democratic Unionist Party (DUP), in protest against the Northern Ireland Protocol.