Buttle Lake is a lake on Vancouver Island in Strathcona Regional District, British Columbia, Canada. It is about 23 kilometres (14 mi) long and 1.5 kilometres (0.9 mi) wide, has an area of 28 square kilometres (11 sq mi), is up to 120 metres (394 ft) deep, and lies at an elevation of 221 metres (725 ft). The lake is located between Campbell River and Gold River in Strathcona Provincial Park. The lake is the headwaters of the Campbell River.

The Strathcona Regional District is a regional district in British Columbia, Canada. It was created on February 15, 2008, encompassing the northern and western portions of the former Regional District of Comox-Strathcona. The partition left the new Strathcona Regional District with 91.6 percent of the former Comox-Strathcona's land area, but only 42.1 percent of its population. Its current territory has a land area of 18,329.948 km2 and a 2016 census population of 44,671 inhabitants. There are 21 named Indian reserves within its territory, with a combined 2016 census population of 1,579 and combined land area of 16.444 km2.