Turtle Lake may refer to:

;Canada

  • Turtle Lake (Temagami), in Ontario
  • Turtle Lake (Saskatchewan)
  • Turtle Lake Monster, cryptid that allegedly lives in the lake
  • Turtle Lake (Vancouver Island)

;Georgia

  • Turtle Lake (Tbilisi), or "Kus Tba"

;United States

  • Turtle Lake (Beltrami County, Minnesota)
  • Turtle Lake (Cass County, Minnesota)
  • Turtle Lake (Douglas County, Minnesota)
  • Turtle Lake (Grant County, Minnesota)
  • Turtle Lake (Polk County, Minnesota)
  • Turtle Lake Township, Beltrami County, Minnesota
  • Turtle Lake Township, Cass County, Minnesota
  • Turtle Lake, Shoreview, Minnesota
  • Turtle Lake Elementary School, Shoreview, Minnesota
  • Turtle Lake, Montana
  • Turtle Lake, North Dakota
  • Turtle Lake, Wisconsin, a village
  • Turtle Lake, Barron County, Wisconsin, a town
  • Turtle Lake, Walworth County, Wisconsin, a CDP

Vietnam

  • Turtle Lake (Ho Chi Minh City)