Nameless Lake is a small, spring-fed endorheic lake on Manitoulin Island in Lake Huron approximately 8.5 kilometres (5.3 mi) south of the town of Gore Bay in the municipality of Gordon/Barrie Island, Manitoulin District in Northeastern Ontario, Canada.

[1] It is approximately 2 kilometres (1 mi) long and over 15 metres (49 ft) deep in some locations, with no public access.

[2] It is the only lake on Manitoulin Island that prohibits all gasoline-powered craft.

[3] Other map sources: