Mount Vernon is the former residence and plantation of George Washington, a Founding Father, commander of the Continental Army in the Revolutionary War, and the first president of the United States, and his wife, Martha. An American landmark, the estate lies on the banks of the Potomac River in Fairfax County, Virginia, approximately 15 miles so…Mount Vernon is the former residence and plantation of George Washington, a Founding Father, commander of the Continental Army in the Revolutionary War, and the first president of the United States, and his wife, Martha. An American landmark, the estate lies on the banks of the Potomac River in Fairfax County, Virginia, approximately 15 miles south of Washington, D.C..