Geography of Washington, D.C.

Washington, D.C. is located in the Mid-Atlantic region of the United States at 38°53′42″N 77°02′11″W, the coordinates of the Zero Milestone, on The Ellipse. According to the United States Census Bureau, the city has a geographical area of 68.3 square miles (176.9 km2), 61.4 square miles (159.0 km2) of which is land, and the remaining 6.9 square miles (17.9 km2) (10.16%) of which is water.