Bostwick is a historic home located at Bladensburg in Prince George's County, Maryland, United States. According to its date plaque, it was built in 1746 by Christopher Lowndes (1713-1785). The house was later the home of Lowndes’ son-in-law, Benjamin Stoddert (1751-1813), first Secretary of the Navy. Colonel Thomas H. Barclay (Tory in the American Revolution; brother-in-law of Lt. Colonel Beverly Robinson; first British consul appointed in New York after the peace of 1783; British agent for prisoners of war in War of 1812) resided at "Bostwick," the oldest surviving structure at Bladensburg. Located nearby is the Market Master's House, also built by Lowndes.
Bostwick is a 2 1⁄2-story brick structure laid up in Flemish bond. A basement and ground level lies under the entire house. The gable roof, with dormer windows, is slightly belled at the eaves. The main (west) facade is five bays with a central doorway. A one-story porch extends across the front, and the pedimented central bay of the porch projects forward. "C.L. 1746" in wrought lead painted black is embedded high in the south chimney. Also on the south side is a distinctive buttress added about 1800 by Stoddert, who was concerned about a crack in the wall on that side of the house. At the base of the buttress are two dungeons or cells. A gable-roofed common bond brick detached kitchen stands northeast of the house. Southeast of the house are several 19th century outbuildings and a barn.
Bostwick was listed on the National Register of Historic Places in 1975.