Princeton (originally Vermilion Forks) is a town in the Similkameen region of southern British Columbia, Canada. It lies just east of the Cascade Mountains, which continue south into Washington, Oregon and California. The Tulameen and Similkameen Rivers converge here. At the 2016 census, the population was 2,828. Princeton centres on seven blocks of businesses along Bridge Street and five blocks on Vermilion Avenue; there are also businesses along British Columbia Highway 3.