The Ontario New Democratic Party (French: Nouveau Parti démocratique de l'Ontario; abbr. ONDP or NDP) is a social-democratic political party in Ontario, Canada. The party currently forms the Official Opposition in Ontario following the 2018 general election. It is a provincial section of the federal New Democratic Party. It was formed in October 1961 from the Co-operative Commonwealth Federation (Ontario Section) (Ontario CCF) and the Ontario Federation of Labour (OFL).