William Johnston Allen (1835 – 12 June 1915) was an Irish-born Australian politician.
[3] His father arrived in Sydney in 1841, and his mother brought William and his sister Eliza Allen, in 1844.
[2] When he grew older, William joined his father in the soap and candle business.
[7] In 1888 William was narrowly elected in a by-election for Paddington in 1888,[1][8] in which three Free Trade members stood for the single vacancy, splitting the vote.
[11] In 1895 the brothers both stood for the single member district of Waverley, however neither were elected.