Walter-Patrice O'Leary (3 July 1910 – 13 September 1989) was a Canadian journalist, political activist and trade unionist.

He attended the Collège Saint-Joseph in Berthierville before travelling to Belgium to study at a Roman Catholic seminary in Wavre.

He served as president of the Quebec Popular Movement for Human Rights (French: Mouvement populaire québécois des droits de l'Homme) from 1966 to 1967, when he founded Quebec International (French: Québec inter-national).

[1] In the Quebec general election of 1966, O'Leary stood as a candidate for the Rassemblement pour l'Indépendance Nationale in the Notre-Dame-de-Grâce riding.

[2] O'Leary published articles in various French-language magazines and newspapers, including L'Indépendance, L'Ordre, and L'Unité.