|Location||Vancouver Island, British Columbia|
|Primary inflows||Ralph River, Thelwood Creek, Wolf River|
|Primary outflows||Campbell River|
|Max. length||23 km (14 mi)|
|Max. width||1.5 km (0.93 mi)|
|Surface area||28 km2 (11 sq mi)|
|Max. depth||120 m (390 ft)|
|Surface elevation||221 m (725 ft)|
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; there is a camping site on the shore. The lake is the source of the Campbell River.
In the 1950s, Upper Campbell Lake was dammed. Water from the dam backed up in to Buttle Lake, raising the lake level by some 5 meters. Because of this, the natural landscape of Buttle Lake has been forever changed. At times of low water, there exists mudflats littered with stumps from the forests which use to stand there. 
It was named after John Buttle, geologist and botanist from Kew Gardens, London, who discovered the lake and mapped the area in 1865. Buttle also explored Vancouver Island as naturalist under Dr Robert Brown as part of the Vancouver Island Exploring Expedition in 1864.
- Walbran, Captain John T. (1971). British Columbia Place Names, Their Origin and History (Facsimile reprint of 1909 ed.). Vancouver: Douglas & McIntyre. p. 75. ISBN 978-0-88894-143-5. OCLC 34583503.
- "Buttle Lake". BC Geographical Names.
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