William Alison (1856 – 12 September 1931) was a Scottish-born Australian politician.
He was born in Strathaven to pastoralists William and Eliza Alison.
He was educated at Bury St Edmunds, and arrived in New South Wales in 1871.
He eventually owned property near Nyngan, and was prominent in the Pastoralists' Union, serving as inaugural vice-president and later president.
On 29 June 1887 he married Ellen Maud Milson, with whom he had three children.