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St. Mary’s County

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St. Mary’s County is situated on a peninsula in Southern Maryland with over 500 miles of shoreline on the Patuxent River, Potomac River and Chesapeake Bay. The area combines access to technology with a rich heritage and a myriad of outdoor sports and recreational opportunities. The county’s location allows for easy access to major metropolitan areas.

St. Mary’s County’s 2,000 businesses employ 28,800 workers; The Naval Air Station, Patuxent River, employing 22,400 military, civilians and defense contractors. With over 200 high-tech aerospace and defense contractors, the county has emerged as a world-class center for maritime aviation research, development, testing, evaluation, and acquisition.

St. Mary’s County is the birthplace of Maryland. Maryland was an idea of George Calvert, First Lord Baltimore. He petitioned King Charles I in the early 1600s for a land grant to establish a new colony, but he died before it came to fruition. In March of 1634, brothers George & Leonard Calvert, along with 140 passengers aboard the Ark and the Dove landed on St. Clement’s Island where Father Andrew White, who sailed with the first colonists, celebrated the first Roman Catholic Mass. Leonard Calvert bought about 30 miles of land below the Wicomico River from the Yaocomaco Indians with bolts of fabric, axes, and other farm tools. The settlers moved in among the Indians who assisted them while they established their settlement. This area became the State’s first capital, St. Mary’s City.

St. Mary’s County is also home to an Amish Community of approximately 350 families. The first Amish families arrived from Lancaster County, Pennsylvania, in around 1940.

In 2010 there were 37,604 households in St Mary’s County and a population of 105,151.There are 17 elementary, 4 middle and 4 public high schools and 40 non public schools. St Mary’s College of Maryland also has 1,859 enrolled students and College of Southern Maryland has 8780 students enrolled.

St. Mary’s County has 5 State parks and 22 county parks, two year-round pools, boat ramps, beaches, fishing piers, tennis courts, picnic facilities, playgrounds, a skate park, and a disc golf course and marinas.

Historic Leonardtown, the county seat founded in 1708, is one of the oldest county seats in the United States. It also features a variety of shops, galleries, restaurants, a waterfront park and a winery.

St. Mary’s County is home to the National Oyster Shucking Contest which takes place at the St. Mary’s County Oyster Festival each October, and home to over 50 other festivals and fairs include the River Concert Series, Crab Festival, County Fair, Blessing of the Fleet, Oyster Festival/National Oyster Shucking Championships, Wine Festival and Monster Rockfish Festival.

For more information, contact St. Mary’s County Division of Tourism: 1.800.327.9023, www.visitstmarysmd.com

St. Mary’s County Government

P.O.Box 653, 41770 Baldridge Street, Leonardtown, MD 20650
Phone 301-475-4200

Contact Directory for St Mary’s Public Agencies

St Mary’s County Dept of Social Services

Public Transport


St. Mary’s County Public Schools (SMCPS)

Tourism, Recreation & Parks

Police – Emergency – Public Safety
Sheriff’s Office

Fire & Rescue Volunteer Services

Animal Control

Public Safety


St. Mary’s County Health Department,
21580 Peabody Street, Leonardtown, MD 20650

MedStar St. Mary’s Hospital
25500 Point Lookout Road, Leonardtown, MD 20650.
Phone: 301-475-8981

Patuxent Medical Clinic: Martin Katherine DO
46940 N Shangri-La Dr, Lexington Park.
Phone (301) 863-8101

Stephen P Cafferty & Associates
22333 Greenview Pkwy, Great Mills.
Phone (301) 737-7885

Shah Associates Offices
Philip J. Bean Medical Center, 24035 Three Notch Road, Hollywood, MD 20636
Phone 301-373-7900

St. Mary’s Medical Center
37767 Market Drive, Suite 200, Charlotte Hall, MD 20622.
Phone 301-884-7330, 301-373-7900

Mechanicsville Office
28170 Old Village Road, Mechanicsville, MD 20659
Phone 301-884-4666, 301-373-7900

Shanti Medical center
26840 Point Lookout Road, Leonardtown, MD 20650.
Phone 301-475-8885, 301-373-7900

Lexington Park Center
22335 Exploration Park Drive, Suite 1035, Lexington Park, MD 20653.
Phone 301-863-9000, 301-373-7900

California Office
23263 By the Mill Road, California, MD 20619
Phone 301-863-5835, 301-373-7900

Breton Medical Center /Super Care
22590 Shady Court, California, MD 20619 (behind CVS)
Phone 301-737-0500, 301-373-7900

St. Mary’s Medical Arts Building
22650 Cedar Lane Court, Leonardtown, MD 20650.
Phone 301-475-5021, 301-373-7900

St. Mary’s Medical Associates
23415 Three Notch Road, California, MD 20619.
Phone 301-997-0055

St. Mary’s Express Care 2 Sites:
St. Mary’s Hospital, 25500 Point Lookout Road, P.O. Box 527, Leonardtown, MD 20650.
Phone 301-290-1499

St. Mary’s Medical Center, 3776 Market Drive, Charlotte Hall, MD 2062
Phone 301-290-1499

Additional resource information, contact your local health department:
St. Mary’s County Health Department, 21580 Peabody Street, P.O. Box 316, Leonardtown, MD 20650
Phone 301-475-4330


St Mary’s Metropolitan Water Commission

Maryland Energy Assistance Program (MEAP) Phone 1-800-352-1446

SMECO: Southern Maryland Electric Cooperative
Phone 301-274-4474

Washington Gas

MetroCast Cable