Willow Lake may refer to:
In the United States (by state):
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Willow Lake (Saguache County, Colorado), an alpine lake
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Willow Lake (Marshallville, Georgia), a house listed on the National Register of Historic Places
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Willow Lake (Idaho), an alpine lake
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Willow Lake, Illinois, a census-designated place
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Willow Lake Township, Redwood County, Minnesota
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Willow Lake (Queens) in Flushing Meadows-Corona Park, Queens, New York
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Willow Lake (South Dakota), a lake in South Dakota
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Willow Lake, South Dakota, a city in South Dakota
In Canada:
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Willow Lake (Alberta), a lake in Wood Buffalo, Alberta; known as ''Gregoire Lake'' 1940–1995
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