Quebec nationalism or Québécois nationalism is a feeling and a political doctrine that prioritizes cultural belonging to, the defence of the interests of, and the recognition of the political legitimacy of the Québécois nation. It has been a movement and a central issue in Quebec politics since the beginning of the 19th century. Québécois nationalism has seen several political, ideological and partisan variations and incarnations over the years.

The French term pure laine, refers to Québécois people of full French Canadian ancestry, meaning those descended from the original settlers of New France who arrived during the 17th and 18th centuries. Terms with a similar meaning include de souche and old stock as in "Old Stock Canadians".