Loon Lake is the 18th largest lake in a county with what population as of the 2010 census?
Loon Lake (Waterford Township, Michigan):  The sand-bottom lake is 243 acres, making it the 18th largest lake in Oakland County, Michigan and one of the largest in Waterford Township. Oakland County, Michigan:  As of the 2010 census, its population was 1,202,362, making it the second-most populous county in Michigan, behind neighboring Wayne County.
1,202,362