Great Mills, Maryland

[1] Great Mills High School serves the lower end of the county, including the town (census CDP) of Lexington Park.

The area was part of the original agricultural expansion after the initial settling of the first Maryland Colony in St. Mary's City, which is located several miles south of Great Mills.

William H. Barnes and James H. Harris were both free African-American farmers who grew up in Great Mills and served as soldiers in the Union Army during the American Civil War.

The site is also a memorial to the more than 700 African-American soldiers and sailors from St. Mary's County, Maryland who served in the Union forces during the American Civil War (this is also discussed in the educational display).

The area is rapidly developing and is home to commuters who work in Lexington Park and the nearby military base, as well as St. Mary's College of Maryland several miles to the south.