William David McPherson (August 22, 1863 – August 22, 1929) was an Ontario barrister and political figure. He represented Toronto West and then Toronto Northwest in the Legislative Assembly of Ontario as a Conservative member from 1908 to 1919.He was born in Moore Township, Lambton County, Canada West, the son of William McPherson, and educated in Strathroy. He married Nettie Jane Batten.