Gibson Lake is a lake in Georgian Bay Township, District Municipality of Muskoka, Ontario, Canada. It is located 45 minutes north of the city of Barrie, and is accessed by Hwy 400 interchange # 174, just north of Six Mile Lake. Gibson Lake borders on the Wahta Mohawk Territory. The lake is 7 kilometres (4.3 mi) long, and flows into Georgian Bay via the Gibson River. The lake comprises two sections with the narrows connecting the North end to the South end. The southern areas of the lake are popular with cottagers from southern Ontario. The first cottagers purchased property here in the 1950s when the land was originally subdivided. There are presently 200 families on the lake with an increasing number of permanent residents. The north-east side of the lake is dominated by the Sahanatien Native Mohawk reserve which has seen much development in recent years.