Walton-on-Thames is a market town on the south bank of the Thames in the Elmbridge borough of Surrey, England. The town itself consists mostly of affluent suburban streets, with a historic town centre of Celtic origin. It is one of the largest towns in the Elmbridge borough, alongside Weybridge. According to the 2011 Census, the town has a total population of 22,834. It is around 15 miles from Central London, and is served by a wide range of transport links.