Shawnigan Lake School is a co-educational independent boarding school located on Vancouver Island in Shawnigan Lake, British Columbia, Canada. It was founded by Englishman Christopher Windley "C. W." Lonsdale in 1916 and was partly modelled after the Westminster School in England.

Shawnigan Lake is the name of a village on British Columbia's Vancouver Island. The name Shawnigan is an adaptation of the Hul'qumi'num name Showe'luqun, for the lake and the village. It is part of Electoral Area B in the Cowichan Valley Regional District. As of 2016, the permanent population of Shawnigan Lake is 8,558.