William Stiles Bennet (November 9, 1870 – December 1, 1962) was an American politician and a U.S. Representative from New York, serving five terms in the early 20th century.

Bennet was a lawyer in private practice and an official reporter of the Orange County Board of Supervisors from 1892 to 1893.

Bennet was the official parliamentarian of the Republican National Convention at Chicago in 1916, United States delegate to the Seventeenth International Congress Against Alcoholism held at Copenhagen, 1923, as well as a business executive.

An unsuccessful candidate for election to the Seventy-fifth Congress in 1936, he served as a delegate to the New York state constitutional convention in 1938.

Bennet died in Falkirk Hospital, Central Valley, Orange County, New York, on December 1, 1962 (age 92 years, 22 days).