Highlandtown Lake is a man-made lake located in Washington Township, Columbiana County, Ohio. It was created in 1966 when the State of Ohio built a dam impounding 170 acres of water on the upper drainage of the Little Yellow Creek. A lot of habitat improvement was done on what would be the bottom of the lake prior to the impoundment. It has about 5 miles of shoreline and a maximum depth of about 26 feet. The lake is about 1100 feet above sea level.