🇺🇸 Washington, United States

Washington, D.C., the capital of the United States, has a population of approximately 700,000 people. While it is not a major seaport city, it is located on the Potomac River, which offers access to the Chesapeake Bay and the Atlantic Ocean. The city is home to several government agencies, including the United States Coast Guard headquarters, making it of interest to seafarers and shipowners involved in maritime affairs. However, it does not have shipyards or factories producing ship parts.