Princeton is a town municipality in the Similkameen area of southern British Columbia, Canada. The former mining and railway hub lies at the confluence of the Tulameen into the Similkameen River, just east of the Cascade Mountains. It is at the junction of BC Highway 3 and 5A.

British Columbia is the westernmost province of Canada. Situated between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, forests, lakes, mountains, inland deserts and grassy plains. British Columbia borders the province of Alberta to the east; the territories of Yukon and Northwest Territories to the north; the U.S. states of Washington, Idaho and Montana to the south, and Alaska to the northwest. With an estimated population of over 5.6 million as of 2024, it is Canada's third-most populous province. The capital of British Columbia is Victoria, while the province's largest city is Vancouver. Vancouver and its suburbs together make up the third-largest metropolitan area in Canada, with the 2021 census recording 2.6 million people in Metro Vancouver.