ZIP Code 20634
About Great Mills
Great Mills is an unincorporated community and populated place in St. Mary's County, Maryland, United States. It is located in southern St. Mary's County near Lexington Park and Naval Air Station Patuxent River. Great Mills High School, located on Great Mills Road, opened in 1929 and is described by St. Mary's County Public Schools as the oldest high school in Southern Maryland.
From Wikipedia — text licensed CC BY-SA 4.0.
Area Profile
US Census (ACS 5-year · Gazetteer)
6,976
population
$117,431
median household income
998
people / sq mi
$334,800
median home value
$1,689
median gross rent
32.3
median age
2,872
housing units
2,538
households
7.0
land area (sq mi)
Key places in 20634
- Saint Marys River State Park park