How Wide Is The Chesapeake Bay. It varies from 3 miles wide in the north to 25 miles wide in the south. And the p,'vjed does just barton saver, chef, author, and

At its widest point, just south of the mouth of the potomac river, it is 30 miles (50 km) wide. 50 to 60 feet deep. Its center, on the other hand, has a thickness of about 172 feet.