Iowa (USA) is 814 times larger than Washington, D.C..
Area: 144,669 km2 US Census
Population: 3,090,416 (July 2013) US Census
Iowa is a U.S. state in the Midwestern United States, a region sometimes called the "American Heartland". Wikipedia
Area: 178 km2 calculated
Population: 632,323 (2012)
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. Wikipedia