Sidney Bruce Smith (1899 – April 1984) was a Canadian lawyer and judge.
Born in Ontario, Smith was educated at the University of Alberta (BA 1919; LLB 1922).
He was called to the Alberta Bar in 1921 and practiced with the Edmonton firm of Smith, Clement, Parlee, Whittaker, Irving, Mustard and Rodney from 1931 to 1959.
In 1959, he was appointed a judge of the Trial Division of the Supreme Court of Alberta.
From 1961 to 1974 he was Chief Justice of Alberta and the Northwest Territories Court of Appeal.