Example image of eyePlorer eyePlorer map for 'Potomac River': Atlantic Ocean Chesapeake Bay United States Drainage basin River Gallon Precipitation (meteorology) Maryland Virginia Washington, D.C. West Virginia Source (river or stream) Cubic foot per second Fairfax Stone Historical Monument State Park Point Lookout State Park Grant County, West Virginia Preston County, West Virginia Tucker County, West Virginia Highland County, Virginia Hightown, Virginia Green Spring, West Virginia Hampshire County, West Virginia Coastal plain Piedmont (United States) Tide Estuary Salinity Algonquian languages Northern Neck Powhatan John Smith (explorer) Greek language United States Board on Geographic Names History of the United States George Washington President of the United States Capital (political) American Civil War Confluence Harpers Ferry, West Virginia Shenandoah River Battle of Antietam Battle of Gettysburg Cumberland, Maryland Georgetown, Washington, D.C. Patowmack Canal Tidewater Canal Chesapeake and Ohio Canal Great Falls (Potomac River)