Lake Mary or Mary Lake may refer to:
Australia Lake Mary, Queensland, a locality in the Shire of Livingstone
Canada Marylake Augustinian Monastery, the property, monastery and retreat centre in King City, Ontario, Canada Mary Lake (Ontario), a small lake in Muskoka, Ontario
United States Populated places Lake Mary, California, an unincorporated community Lake Mary, Florida, a city in Seminole County, Florida Lake Mary Township, Douglas County, Minnesota
Lakes Lake Mary (Arizona), a reservoir south east of Flagstaff Lake Mary (California), a lake near Lake Mary, California in Mono County Mary Lake (California), a lake in Redding, California Mary Lake (Clearwater and Hubbard counties, Minnesota) Lake Mary (Crow Wing County, Minnesota) Lake Mary (Douglas County, Minnesota) Lake Mary (Wisconsin), see Meromictic lake Mary Lake, a lake in Le Sueur County, Minnesota Lake Mary, a lake in McLeod County, Minnesota Mary Lake, a lake in Watonwan County, Minnesota Lake Mary (South Dakota)
See also Llyn Mair, the Welsh name for Mary's Lake, an artificial lake in North Wales