Chesapeake Bay

The Chesapeake Bay is the largest estuary in the United States. It lies off the Atlantic Ocean, surrounded by Maryland and Virginia. The Chesapeake Bay's watershed covers 64,299 mi² (166 534 km²) in the District of Columbia and part of six states: New York, Pennsylvania, Delaware, Maryland, Virginia, and West Virginia. More than 150 rivers and streams drain into the Bay.

The Chesapeake Bay is about 200 miles (300 km) long, from the Susquehanna River in the north to the Atlantic Ocean in the south. At its narrowest point near Annapolis, Maryland, the Bay is 4 miles (6.4 km) wide; at its widest point, near the mouth of the Potomac River, it is 30 miles (50 km) wide. Total shoreline for the Bay and its tributaries is 11,684 miles (18 804 km), and the surface area of the bay and its major tributaries is 4,479 mi² (11 600 km²).

The bay is spanned in two places. The Chesapeake Bay Bridge crosses the bay in Maryland from Sandy Point (near Annapolis) to Kent Island; the Chesapeake Bay Bridge-Tunnel in Virginia connects Virginia Beach to Cape Charles.

The word Chesepiooc is an Algonquian word commonly believed to mean "Great Shellfish Bay;" however, a reconstruction of Virginian Algonquian implies that the word may mean something like "Great Water" or it might just be the name of a village at the mouth of the bay.