The East Coast of the United States is its border with the Atlantic Ocean, stretching from Quoddy Head, Maine to Key West, Florida. Some definitions may extend the east coast to the Gulf of Mexico, up to the United States-Mexico border. Almost a third of the population of the United States lives on or near the east coast: some 90 million people.
The East Coast has a vibrant economy based on retail, finance, tourism, agriculture and services; virtually all economic sectors. The greatest population densities occur in the New York and Miami metro areas, and these areas also have high percentages of immigrants. More people in Miami speak Spanish than English. Washington, D.C., the capital of the United States, is located on the Potomac River estuary of the Chesapeake Bay. The urban axis stretching from Washington to Boston itself contains over 50 million people, housing nearly 1 in 6 people in the US.