Joshua Proctor Brown Westhead (April 15, 1807–July 8, 1877) was a British politician. He was elected as a Liberal MP for Knaresborough from 1847 to 1852.
He returned to the Commons as MP for City of York from 1857 to 1865, and again from 1868 until he resigned in 1871 by becoming Steward of the Manor of Northstead.
In 1828 he married Betsy Chapell (1807-1888), daughter of George Royle Chapell of Nelson house.together they had four children.
, 1872)