Mount Airy Mansion

Mount Airy Mansion
Mount Airy Mansion, 2016
Location9640 Rosaryville Road, Upper Marlboro, Maryland
Coordinates38°46′33″N 76°49′08″W / 38.775971620333756°N 76.81893998819994°W / 38.775971620333756; -76.81893998819994
AreaRosaryville State Park

The Mount Airy Mansion is a historic building near Upper Marlboro in Prince George's County, Maryland. Expanded c. 1751 on the site of the 17th century hunting lodge of Charles Calvert, 3rd Baron Baltimore by his great-grandson Benedict Swingate Calvert, the mansion today is managed by the Maryland Department of Natural Resources within the Rosaryville State Park.