Washinton D.C. (DIstrict of Columbia), is the capital of United States. The signing of the Residence Act on July 16, 1790, approved the creation of a capital district located along the Potomac River on the country's East Coast. The U.S. Constitution provided for a federal district under the exclusive jurisdiction of the Congress and the District is therefore not a part of any U.S. state. Washington has a population of 672,228 as of July 2015. In "The Strain", as of Season 2, everything seems normal, vampires haven't reached the city as of yet, as law enforcement has not tightened up security in airports, and other transportation hubs beside Union Station.