Lake Saint Clair

Lake Saint Clair or Lake St. Clair may refer to:


 * Australia
 * Lake St Clair (Tasmania)
 * Lake St Clair (New South Wales)


 * North America
 * Lake Saint Clair (North America), part of the international boundary between Michigan and Ontario, and carrying the water outflow of Lake Huron
 * Lake Saint Clair (Arizona), a reservoir built in 1974
 * Lake Saint Clair (Virginia)

Saint Clair Lake or St. Clair Lake may refer to
 * St. Clair Lake (Michigan) part of the Elk River Chain of Lakes Watershed
 * Saint Clair Lake (Washington) in Thurston County, Washington