The City of Fort St. John is a city in northeastern British Columbia, Canada. A member municipality of the Peace River Regional District, the city encompasses a total area of about 22 square kilometres (8.5 sq mi) with 18,609 residents at the 2011 census (More than 21,000 by the end of 2015). Located at Mile 47, it is one of the largest cities along the Alaska Highway. Originally established in 1794, as a trading post, Fort St. John is the oldest European-established settlement in present-day British Columbia. Fort St. John is served by the Fort St. John Airport. The municipal slogan is Fort St. John: The Energetic City.