William John Sandwith (29 October 1922 – 8 July 1999) was an Australian politician.
He was a Liberal member of the New South Wales Legislative Council from 1976 to 1984.
Sandwith was born in Sydney, and worked as an engineer and company director before entering politics.
He was a director of the New South Wales Permanent Building Society, the New South Wales Group of Terminating Building Societies, the World Permanent Building Society, Home Owners Insurance Pty Ltd, Residential Insurances Pty Ltd, Management and Financial Services Pty Ltd, and St George District Hospital.
This article about a Liberal Party of Australia politician is a stub.