Lake Washington or Washington Lake may refer to:
- Lake Washington, a lake bordering Seattle
- Lake Washington (Florida), a lake at Melbourne, Florida
- Washington Lake (Idaho), a freshwater lake in the White Cloud Mountains
- Washington Lake Township, Minnesota, a township in Sibley County, Minnesota
- Lake Washington (Le Sueur and Blue Earth counties, Minnesota)
- Lake Washington (Meeker County, Minnesota)
- Washington Lake (Sibley County, Minnesota)
- Lake Washington (Mississippi), a lake in Washington County
- Lake Washington (New York), main reservoir for the city of Newburgh, New York
- Washington Lake, the freshwater lake of Teraina, Kiribati
- Lake Washington Boulevard, a scenic route in Seattle that hugs Lake Washington
- Lake Washington Technical College
- Lake Washington, Florida (neighborhood), in Melbourne, Florida
|This disambiguation page lists articles about distinct geographical locations with the same name.
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