| William A. Quinton | |
| Birth Date: | 4 April 1845 |
| Birth Place: | Lancaster, New Brunswick |
| Office: | MLA for St. John County |
| Term: | 1883 to 1890 |
| Party: | Liberal Party of New Brunswick |
William Alfred Quinton (April 4, 1845 - February 7, 1927) was a farmer and political figure in New Brunswick, Canada. He represented St. John County in the Legislative Assembly of New Brunswick from 1883 to 1890 as a Liberal member.
He was born in Lancaster, New Brunswick,[1] the son of James Quinton and Elizabeth Tilley,[2] and was educated in Saint John. Quinton served on the municipal council and was a major in the militia. He was also involved in lumbering.[1] In 1877, he married Kate Allan.[2]
He died February 7, 1927.[3]