Blue Lake may refer to:
Places
Antarctica
Blue Lake (Ross Island)
Australia
Blue Lake (New South Wales)
Blue Lake (Queensland)
Blue Lake National Park, a former protected area in Queensland
Blue Lake / Warwar, South Australia
Croatia
Blue Lake (Croatia)
Italy
Blue Lake (Italy)
New Zealand
Blue Lake (Bay of Plenty)
Blue Lake (Canterbury)
Blue Lake (Otago)
Blue Lake (Tasman)
Blue Lake (Waikato), in a crater of Mount Tongariro
Blue Lake (Raoul Island), in the Kermadec Islands
Romania
Blue Lake (Maramureș County), natural monument, collapsed mine gallery
United States
Blue Lake (Alaska)
Arkansas
Blue Lake in Crittenden County, Arkansas
Blue Lake in Lee County, Arkansas
Blue Lake in Ouachita County, Arkansas
Blue Lake in Polk County, Arkansas
Either of two Blue Lakes in Prairie County, Arkansas
Blue Lake in Union County, Arkansas
Blue Lake in Woodruff County, Arkansas
California
Blue Lake, California – a city in Humboldt County
Blue Lakes (California) – a string of lakes in Lake County
Blue Lake (Madera County, California)
Florida
Blue Lake, north of Lake Placid, Florida
Blue Lake (Sebring, Florida)
Indiana
Blue Lake, Indiana
Blue Lake, Indianapolis, Indiana
Michigan
Blue Lake (Michigan)
Blue Lake Township, Kalkaska County, Michigan
Blue Lake Township, Muskegon County, Michigan
Minnesota
Blue Lake (Hubbard County, Minnesota)
New Mexico
Blue Lake (New Mexico)
Oregon
Blue Lake Regional Park in Fairview, Oregon
Blue Lake (Oregon)
Washington
Blue Lake, in Grant County, Washington, north of Soap Lake, Washington
Utah
Blue Lake (Utah)
Other
a variety of Green beans
Blue Lake Fine Arts Camp in Twin Lake, Michigan