William Sawyer (November 25, 1815 – January 11, 1904) was a lumber merchant and political figure in Quebec. He represented Compton in the Legislative Assembly of Quebec from 1871 to 1886 as a Conservative.

He was born in Sawyerville, Quebec, the son of John Sawyer. His grandfather, Josiah Sawyer, after whom Sawyerville was named,^[1] was originally from Massachusetts and received a large land grant in Eaton Township.^[2] Sawyer owned sawmills and grist mills.^[1] He was a member of the council for Eaton Township from 1855 to 1872,^[1] serving as mayor,^[2] and was warden for Compton County. In 1839, he married Julia Smith. He died at Sawyerville at the age of 88.