Washington DC is the capital of the United States of America in the District of Columbia and is located on the border of a US state. The United States Constitution defines the region as a federal zone. Washington is located on the north coast of the Butomac River. Maryland is located on the south coast of the Potomac River at 38.9 ° C and 77.04 ° C and 6 meters above sea level in the largest city in the District of Columbia. That Washington City is different Washington, a state of the United States of America, is located at the northwestern tip of the country and the Pacific Ocean lies to the west.