William Bennett (7 April 1873 – 4 November 1937) was a British Labour Party politician who served as the Member of Parliament (MP) for Battersea South in London from 1929 to 1931. He first stood for Parliament at the 1918 general election, when he was unsuccessful in Guildford, a safe seat for the Conservative Party. He contested Guildford again in 1922 and 1923, and did not stand again until the Battersea South by-election in February 1929. The vacancy had arisen when the Conservative MP Francis Curzon succeeded to the peerage as Earl Howe, and in a three-way contest Bennett took the seat for Labour with a majority of 2.1% of the votes. He was re-elected at the general election in May 1929 with a majority of only 1.1%, but at the 1931 general election he was soundly defeated by the Conser