New Zealand Labour Party

The New Zealand Labour Party, also known simply as Labour (Māori: Reipa), is a centre-left political party in New Zealand. The party's platform programme describes its founding principle as democratic socialism, while observers describe Labour as social democratic and pragmatic in practice. The party participates in the international Progressive Alliance. It is one of two major political parties in New Zealand, alongside its traditional rival, the National Party.

The New Zealand Labour Party formed in 1916 out of various socialist parties and trade unions. It is the country's oldest political party still in existence. Alongside the National Party, Labour has alternated in leading governments of New Zealand since the 1930s. As of 2020, there have been six periods of Labour government under 11 Labour prime ministers. The party has traditionally been supported by the working classes, Māori, Pasifika, and has had strongholds in inner cities and the Māori seats for much of its existence. Labour won the party vote in 71 out of 72 electorates in the 2020 election, making it overwhelmingly the most successful political party of the MMP era.