Neither. Washington DC is a Federal District that was created in 1870 from land ceded by the state of Maryland and the Commonwealth of Virginia. Subsequent the land originally provided by the commonwealth was returned (or retroceded). Washington DC lies between Maryland and Virginia.
maryland
Virginia and Maryland
Maryland
Virginia
Washington D.C used land from Maryland and Virginia.
Virginia and Maryland
It isn't in Maryland. It is in the District of Columbia which was created from land annexed from Virginia and Maryland.
Washington, DC is located between Virginia and Maryland
Virginia and Maryland.
Washington, DC is surrounded by the states of Maryland and Virginia.
Washington D.C. is located between the states of Virginia (on its southwest side) and Maryland (on its southeast, northeast, and northwest sides).Maryland and Virginia.
Maryland and Virginia