William David Beazley (7 October 1854 – 28 June 1912) was an English Australian politician, who was a member of the Victorian Legislative Assembly for the electoral district of Collingwood from 1889 to 1904, and for Abbotsford from 1904 to 1912.

In March 1889, he was elected as one of two members for Collingwood in the Victorian Legislative Assembly.

In 1904, the seat became a single-member electorate, and Beazley was elected for the new district of Abbotsford.

In addition to his positions in the Parliament of Victoria, Beazley also served as mayor of Collingwood on two occasions during his parliamentary term, from 1894 to 1895 and from 1899 to 1901.

[1] His appointments included Chairman of Committees from 1897 to 1903, and Speaker of the Victorian Legislative Assembly from 1903 to 1904.