The Kennedy Farm is a National Historic Landmark property on Chestnut Grove Road in rural southern Washington County, Maryland. It is notable as the place where the radical abolitionist John Brown planned and began his raid on Harpers Ferry, Virginia (today West Virginia), in 1859. Also known as the John Brown Raid Headquarters and Kennedy Farmhouse, the log, stone, and brick building has been restored to its appearance at the time of the raid. The farm is now owned by a preservation nonprofit.