Westonaria (formerly Venterspost) is a town found in the province of Gauteng, Rand West City Local Municipality, part of the West Rand District Municipality, South Africa that was the result of the amalgamation of the townships Venterspost and Westonaria in 1948.
It was formed in 1948 by the amalgamation of the townships Venterspost, proclaimed in 1937, and Westonaria, proclaimed in 1938. First called Venterspost, the name was changed to Westonaria when municipal status was attained in 1952. Westonaria is a town in the west of Gauteng province of South Africa. It is situated in the Rand West City Local Municipality, part of the West Rand District Municipality. 
