The Parti Québécois is a sovereignist and social democratic provincial political party in Quebec, Canada. The PQ advocates national sovereignty for Quebec involving independence of the province of Quebec from Canada and establishing a sovereign state. The PQ has also promoted the possibility of maintaining a loose political and economic sovereignty-association between Quebec and Canada. The party traditionally has support from the labour movement; however, unlike most other social democratic parties, its ties with organized labour are informal. Members and supporters of the PQ are nicknamed péquistes, a French word derived from the pronunciation of the party's initials in Quebec French.

The Quebec sovereignty movement is a political movement whose objective is to achieve the independence of Quebec from Canada. Sovereignists suggest that the people of Quebec make use of their right to self-determination – a principle that includes the possibility of choosing between integration with a third state, political association with another state or independence – so that Québécois, collectively and by democratic means, give themselves a sovereign state with its own independent constitution.