St. Mary's, Charles, Prince George's, Montgomery, Frederick, Washington, Allegany & Garrett
The Potomac River separates Maryland and Virginia.
The Potomac River
The Potomac River divides Maryland and Virginia (The Southern Border) , but Virginia does not own half of the Potomac River.
The Potomac River forms part of the border between Washington D.C. and Maryland.
Maryland/Virginia border, flows into the Chesapeake bayUnited States [West Virginia, Maryland, Virginia and District of Columbia]
The Potomac is the longest river in Maryland
Washington DC is situated on the Potomac and Anacostia rivers. Virginia has a coastline on the Atlantic ocean. The Chesapeake Bay has offshoots and inlets that enter Maryland and Virginia and effectively surround DC on three sides.
Maryland. Maryland.
The Potomac River
The Potomac River forms most of Maryland's western boundary.
MARYLAND
it is the Alexandria city on the potomac river