Leonardtown High School is a comprehensive public high school in Leonardtown, Maryland, United States, for students in grades 9–12. It offers college preparatory programs and programs that prepare students for business and technical occupations. It serves the community in the central portion of St. Mary's County, Maryland, between the Potomac River and Patuxent River. The area is a mixture of rural and suburban communities. Many of the families are employed by NAS Patuxent River, government contractors, St. Mary's College of Maryland, St Mary's County government and others involved in the traditional agriculture and water related businesses.