William Morrison, KC, (April 20, 1878 - March 16, 1947) was Mayor of Hamilton, Ontario, Canada, from 1935 to 1943. First serving as a lawyer and, later, a Crown Prosecutor, Morrison was first elected as an alderman for Ward 2 in 1921. He was re-elected in 1922. Two years later, he secured a seat on the Board of Control. He was elected in a by-election in 1928 as the Conservative Party Member of Provincial Parliament for Hamilton East. He was re-elected in 1929, and served until he was defeated in 1934. During his time with the Conservatives he nominated Colonel George Drew as leader of the party.