The county is part of the Southern Maryland region.
St. Mary's County was the first county established in Maryland, in 1637, probably by an order of the Governor.
The county seat and state capital was St. Mary's City.
St. Mary's County is where Francis Scott Key, the author of a poem which became The Star Spangled Banner, and professional wrestler Scott Hall grew up. St. Mary's County was the birthplace of Dashiell Hammett, and Orlando "Tubby" Smith, head basketball coach at the University of Minnesota. The largest employer is Patuxent River Naval Air Station and its related aerospace contract firms. There are both Amish and Mennonite communities who follow traditional ways. Tobacco, once dominant crop, has declined in recent years. Maryland International Raceway (Budd's Creek) attracts many auto racing enthusiasts.
There were 8,361 households out of which 25.90% had children under the age of 18 living with them, 46.10% were married couples living together, 15.10% have a woman whose husband does not live with her, and 34.90% were non-families. 29.40% of all households were made up of individuals and 12.90% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.92.
In the county the population was spread out with 18.50% under the age of 18, 15.70% from 18 to 24, 29.50% from 25 to 44, 22.20% from 45 to 64, and 14.20% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 114.60 males. For every 100 females age 18 and over, there were 119.10 males.
The median income for a household in the county was $29,903, and the median income for a family was $37,643. Males had a median income of $27,496 versus $23,035 for females. The per capita income for the county was $15,965. 20.10% of the population and 15.00% of families were below the poverty line. Out of the total people living in poverty, 28.40% are under the age of 18 and 19.10% are 65 or older.
Unincorporated areas are also considered as towns by many people and listed in many collections of towns, but they lack local government. Various organizations, such as the United States Census Bureau, the United States Postal Service, and local chambers of commerce, define the communities they wish to recognize differently, and since they are not incorporated, their boundaries have no official status outside the organizations in question. The Census Bureau recognizes the following census-designated places in the county:
Other unincorporated areas include:
St. Mary Medical Center Breaks Ground on Expanded Emergency Department and Trauma Center; New Facility Will Transform Care-Delivery Model.
Jul 23, 2011; St. Mary Medical Center broke ground today for a $22 million expansion and redesign of its Emergency Department and Trauma Center...
St. Mary's College Students to Infuse 1,000 Hours of Service into Local Community in April - National Volunteer Month
Mar 13, 2013; ST. MARY'S CITY, Md., March 13 -- St. Mary's College of Maryland issued the following news release:St. Mary's College of Maryland...