William Webster (7 June 1860 – 3 October 1936) was an Australian politician. He began his career in the Australian Labor Party (ALP), serving a single term in the New South Wales Legislative Assembly (1901–1903) before winning election to the House of Representatives at the 1903 federal election. He served as Postmaster-General in the Hughes Government from 1915 to 1920. He left the ALP during the 1916 party split and remained in parliament as a Nationalist until his defeat in 1919.