William Humphrey Bennett, KC (December 23, 1859 – March 15, 1925) was a Canadian politician.

Born in Barrie, Canada West, the son of Humphrey Bennett and Anne A. Fraser, Bennett was educated at the Barrie Public and High Schools.

He was a candidate for the House of Commons of Canada in the riding of Simcoe East in the 1891 federal election.

In 1917, he was summoned to the Senate of Canada on the advice of Robert Laird Borden representing the senatorial division of Simcoe East, Ontario.

[citation needed] He was an early mentor of George Dudley, who served as an articled clerk under Bennett.