The Squamish-Lillooet Regional District is a quasi-municipal administrative area in British Columbia, Canada. It stretches from Britannia Beach in the south to Pavilion in the north. Lillooet, Pemberton, Whistler and Squamish are the four municipalities in the regional district. Its administrative offices are in the Village of Pemberton, although the district municipalities of Squamish, Whistler, and Lillooet are all larger population centres. The district covers 16,353.68 km² (6,314.19 sq mi) of land area.
The southern end of the regional district comprises the northern part of the traditional territory of the Skwxwu7mesh people, and the northern half constitutes the traditional homeland of the St'at'imc people.