St. Mary's County, Maryland

St. Mary's Peninsula is part of the Western Shore region of Maryland. From the Charles County line, just north of Charlotte Hall, Maryland, to the southern tip of St. Mary's County at Point Lookout State Park, St. Mary's Peninsula stretches about 39 miles (63 km). It is bordered on the southwest by the Potomac River, on the north and east by the Patuxent River and on the east by Chesapeake Bay. From the end of these two rivers, the peninsula has about 15 miles of shoreline along the Bay's western shore from Lexington Park, Maryland to Point Lookout. Its shoreline stretches for a total of 536 miles along the Patuxent River, Potomac River and the Chesapeake Bay.Conterminous with the boundaries of St. Mary's County, the peninsula covers a land area of 361.25 square miles (935.6 km2).Northeast of St. Mary's Peninsula, on the opposite side of the Patuxent River, is the smaller Calvert Peninsula. Like St. Mary's Peninsula, Calvert Peninsula also has boundaries conterminous with a single Maryland county.

WMDM is a classic hits formatted broadcast radio station licensed to Lexington Park, Maryland, serving Southern Maryland and the Northern Neck. WMDM is owned and operated by Somar Communications, Inc.

St. Andrew's Church is a historic church located at 44078 St. Andrew's Church Road, California near Leonardtown, St. Mary's County, Maryland. It was built in 1766 to serve as the parish church of St. Andrew's Parish, which had been established in 1744. It is a rectangular brick box church laid in Flemish bond with a gable roof and round-arched windows trimmed with brick segmental arches. At two corners stand two-story square brick towers with a diminutive spire. Richard Boulton designed the church in 1766; he was also responsible for the outstanding carving and ornamentation at Sotterley. George Plater (1735-1792), who briefly served as Maryland's governor before his death, was an active parish member, serving twenty-eight years as a vestryman.It was listed on the National Register of Historic Places in 1973.

Mulberry Fields is a historic home located at Beauvue, St. Mary's County, Maryland, United States. It was built about 1763, and is a large 2+1⁄2-story, 5-bay by 2-bay, hip-roofed brick house. On the front is a two-story Doric portico, built about 1820. The house is the only remaining Georgian "mansion-type" home in an area and has a panoramic view of the Potomac River, with a mile-long allee stretching downhill to the riverbank.Mulberry Fields was listed on the National Register of Historic Places in 1973.

Callaway is a census designated place in St. Mary's County, Maryland, United States. The elevation is 105 feet (32 m). Per the 2020 Census, the population was 1,779.

St. Mary's River State Park is a public recreation area located in St. Mary's County, Maryland. The state park consists of two sites: one encompasses 250-acre (100 ha) St. Mary's Lake (an automated gate wants $3 for Marylanders, $5 for others); the second covers 2,200 acres (890 ha) and is largely undeveloped. The park is managed by the Maryland Department of Natural Resources.

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. Leonardtown High School is accredited by the Middle States Association of Colleges and Secondary Schools and the Maryland State Department of Education. Leonardtown High School belongs to the St. Mary's County Public Schools system, and is associated with two other county high school rivals, Great Mills High School and Chopticon High School. Leonardtown High School Athletics belongs to the Southern Maryland Athletic Conference and competes in Division 4A in the state competitions force. According to Public School Review, as of 2022, Leonardtown High School is ranked #45 out of 1,343 schools, which ranks it among the top 5% of public schools in Maryland.

Wildewood is a planned community and census-designated place (CDP) in St. Mary's County, Maryland, United States. It is in east-central St. Mary's County, 7 miles (11 km) east of Leonardtown, the county seat, and 58 miles (93 km) southeast of Washington, D.C. It is bordered to the east by the unincorporated community of California. Wildewood was first listed as a CDP prior to the 2020 census which listed a population of 7,821.

Cecil's Mill Historic District is a national historic district in Great Mills, St. Mary's County, Maryland. It consists of four buildings: Cecil's Mill, Cecil Store, the Cecil Home, and Old Holy Face Church. Cecil's Mill is a 2+1⁄2-story wood-framed structure, that was used until 1959. Across from the mill is the store, house, and Holy Face Church. The store was constructed in the 1920s and is a good example of a rural store. The Cecil Home was constructed in the late 19th century. Old Holy Face Church is a 2+1⁄2-story frame church that was abandoned in the 1940s.It was added to the National Register of Historic Places in 1978.

Beauvue is an unincorporated community in St. Mary's County, Maryland, United States. Mulberry Fields was listed on the National Register of Historic Places in 1973.

St. Mary's County Regional Airport (IATA: LTW, FAA LID: 2W6), also known as Captain Walter Francis Duke Regional Airport, is a public airport located in St. Mary's County, Maryland, United States, four miles (six km) northeast of the central business district of Leonardtown. The airport is also located 8 nmi (15 km) west of Naval Air Station Patuxent River. It is owned and operated by the St. Mary's County Board of County Commissioners.St. Mary's County Regional Airport has been in operation since 1969. The airport was re-dedicated as the Captain Walter Francis Duke Regional Airport in 2000. It recently reverted to its original name.

Great Mills is an unincorporated community in St. Mary's County, Maryland, United States. Great Mills High School serves the lower end of the county, including the town (census CDP) of Lexington Park. The area is site of some of the oldest agricultural settlements in Maryland, as well as English speaking North America. It had many links to the original Maryland colony in St. Mary's City. It is also now a suburb of Lexington Park and the Patuxent River Naval Air Station.