Kitimat is a district municipality in the North Coast region of British Columbia, Canada. It is a member municipality of the Regional District of Kitimat–Stikine regional government. The Kitimat Valley is part of the most populous urban district in northwest British Columbia, which includes Terrace to the north along the Skeena River Valley. The city was planned and built by the Aluminum Company of Canada during the 1950s. Its post office was approved on 6 June 1952.