Oak Grove is a historic home located at La Plata, Charles County, Maryland, United States. It was built in the early Federal style about 1800, and is a one-story, two part brick house of Flemish bond masonry. Two outbuildings date from the 19th century: a small frame dependency built about 1830, and a small corncrib with flanking sheds. Believed to be contemporary in age with the house, it was extensively renovated and partially rebuilt at various times in the 19th and early 20th centuries. The property was originally part of Green's Inheritance.