Sir Joseph Dubuc (26 December 1840 – 7 January 1914), was a Canadian lawyer, politician, and judge who was born in Lower Canada and became an important political figure from Manitoba.

He received a Bachelor of Common Law degree from McGill College in 1869 and was called to the Lower Canada bar the same year.

Dubuc left for Manitoba in June and, upon his arrival in the Red River area,[1] became friends with Bishop Alexandre-Antonin Taché who dissuaded him of his doubts.

He wrote articles for the Montreal newspaper La Minerve explaining the position of the Métis and encouraging francophones to settle in the Canadian West.

Dubuc resigned from the provincial legislature was acclaimed in Provencher in the federal election of 1878[1] but left the House of Commons the next year to accept a judicial appointment on the Court of Queen's Bench of Manitoba.