William Frederick Vilas (15 July 1853 – 15 August 1930) was a Canadian politician.
Born in East Farnham, Canada East, Vilas was mayor of Cowansville, Quebec from 1911 to 1922.
He was acclaimed to the Legislative Assembly of Quebec for Brome in a 1906 by-election.
He was appointed to the Legislative Council of Quebec for Wellington in 1917.
He served until his death in Cowansville, Quebec in 1930.