Major Bodies of Water Near Washington, D.C.

Waterways Accessible from the Nation’s Capital

Washington, D.C. sits at the confluence of several significant water bodies:

Potomac River

Flows directly through the city, forming the border with Virginia. It’s the region’s defining waterway, connecting to the Chesapeake Bay downstream.

Chesapeake Bay

~200 miles southeast. The largest U.S. estuary, reachable via the Potomac. Vital for ecology, recreation, and commerce.

Atlantic Ocean

~100 miles east (to the Delaware/Maryland coast). The Bay’s mouth opens into the Atlantic, giving D.C. indirect ocean access.

Other notable nearby waters include the Anacostia River (tributary of the Potomac) and numerous reservoirs like Occoquan and Patuxent that supply drinking water.