Alberta New Democratic Party

53.5488°N 113.5181°W / 53.5488; -113.5181

The Alberta New Democratic Party (French: Nouveau Parti démocratique de l'Alberta), commonly shortened to Alberta NDP, is a social-democratic political party in Alberta, Canada. It is the provincial Alberta affiliate of the federal New Democratic Party, and the successor to the Alberta section of the Co-operative Commonwealth Federation and the even earlier Alberta wing of the Canadian Labour Party and the United Farmers of Alberta. From the mid-1980s to 2004, the party abbreviated its name as the "New Democrats" (ND).

The party served as Official Opposition in the Legislative Assembly of Alberta from 1982 to 1993. It was shut out of the legislature following the 1993 election, returning in the 1997 election with two seats. The party won no more than four seats in subsequent elections until the 2015 election, in which it won 54 of the 87 seats in the legislature and formed a majority government. Until 2015, Alberta had been the only province in western Canada—the party's birthplace—where the NDP had never governed at the provincial level. The Alberta NDP was defeated after a single term in the 2019 election by the United Conservative Party—the first time that a governing party in Alberta had been unseated after a single term.