Omaha // is the largest city in the state of Nebraska, United States, and is the county seat of Douglas County. It is located in theMidwestern United States on the Missouri River, about 20 miles (30 km) north of the mouth of the Platte River. Omaha is the anchor of theOmaha-Council Bluffs metropolitan area, which includes Council Bluffs, Iowa, across the Missouri River from Omaha.
According to the 2010 Census, Omaha's population was 408,958, making it the nation's 42nd-largest city. According to the 2011 Population Estimates, Omaha's population was 415,068. Including its suburbs, Omaha formed the 60th-largest metropolitan area in the United States in 2010, with an estimated population of 877,110 residing in eight counties. There are more than 1.2 million residents within a 50-mile (80-km) radius of the city's center, forming the Greater Omaha area.