Saint Mary's County (often abbreviated as St. Mary's County), established in 1637, is a county located in the state of Maryland. Based on the 2010 census, the population was 105,151. Its county seat is Leonardtown. The name is in honor of Mary, the mother of Jesus.
St. Mary's County comprises the California-Lexington Park, MD Metropolitan Statistical Area, which is also included in the
Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. It is part of the Southern Maryland region.
Mary, Lady Somerset, sister-in-law of C?ilius Calvert, 2nd Baron Baltimore
County QuickFacts: CensusBureau Quick Facts
The settlement of Lord Baltimore's Maryland began with the arrival of passengers from England at St. Clement's
Island in the Potomac River in what is now southwestern St. Mary's County on March 25, 1634 (the anniversary of this landing being annually
celebrated as Maryland Day). The passengers arrived in two vessels, the Ark and the Dove, which had set sail from the Isle of Wight on
November 22, 1633. The county is also home to the first Catholic Mass celebrated in one of the original thirteen colonies -after they'd become
English colonies (masses were said in 1526-7 at San Miguel de Gualdape).
Due to the small size of the Island, and its lack of resources, the intention was never to make a permanent settlement there. Instead it was
used as a base for the settlers while scouting for a more suitable site. This was how a bluff overlooking the nearby St. Marys River was
chosen for numerous reasons, and became the site of the first permanent settlement. It would soon be named "St. Marys City".
St. Mary's City, Maryland is the site of the first Maryland Capitol and remained so for over 50 years until 1695, when the capitol was moved
to Annapolis.
Today Historic St. Mary's City is a major attraction in Maryland with four museums, a reconstructed colonial village and the reconstructed
Maryland Dove settlers ship. It is also now one of the top archeological research sites in North America.
St. Mary's County was the first county established in Maryland, in 1637, probably by an order of the Governor.
As reported by the Census Bureau, the county has a total area of 764 square miles (1,980 km2), of which 357 square miles (920 km2) is
land and 407 square miles (1,050 km2) (%) is water. It is the second-largest county in Maryland by total area.
Located on the St. Mary's Peninsula, St. Mary's County is largely bordered by water: the Patuxent River (northeast), the Chesapeake Bay
(east), the Potomac River (southwest), and the Wicomico River (west). Its coastline also has many coves, tidal creeks, bays and inlets. Many
coastal areas are made up of mixed clay-and-sand cliffs and bluffs, which protect many parts of the county from storm surges, however there
are also low-lying coastal areas with coarse sand or gravel beaches or tidal marshlands.
The interior of much of the county is hilly to varying degrees, with forests and agricultural fields. There are also coastal plain areas, much
of which are also under agriculture or under new development. Residential development has been steadily increasing for decades.
The county's very extensive waters are mostly brackish, ranging from significant degrees of saltwater in tidal areas that are on or near the
Chesapeake Bay, to a greater predominance of freshwater and lower salt concentrations in its interior tidal waterways and also further up its
bordering rivers.
Bordering counties are as follows: