William Weston III (fl. 1415–1447) of Ockham, Surrey, was an English politician.
He was the son of William Weston, MP for Surrey, and his son, John Weston, was also an MP. The Weston family were prominent in the area.
He was a Member of the Parliament of England for Guildford in 1415, 1419, 1423 and 1431, and then for Surrey in 1447.[1]