Sir Horace Archambeault, QC (March 6, 1857 – August 25, 1918) was a Canadian politician, judge, and a faculty member in Quebec. He was born in L'Assomption, Quebec, and studied classics and law. He moved to Montreal and created a law firm with partners. In 1881 he became a professor at Université Laval, eventually becoming the dean of the university's law school. In 1888, Archambeault replaced his father as representative for the division of Repentigny in the Legislative Council of Quebec, becoming its speaker and the attorney general of Quebec in 1897. He was appointed a judge for the Quebec Court of King's Bench in 1908 and became its chief justice in 1911. He was knighted in 1915 and died in Trois-Pistoles in 1918.