Denver, officially the City and County of Denver is the largest city and capital of the State of Colorado. Denver is also the second-most populous county in Colorado after El Paso County. Denver is a consolidated city and county located in the South Platte River Valley on the western edge of the High Plains just east of the Front Range of the Rocky Mountains. The Denver downtown district is located immediately east of the confluence of Cherry Creek with the South Platte River, approximately 12 miles (19 km) east of the foothills of the Rocky Mountains. Denver is nicknamed the Mile-High City because its official elevation is exactly one mile (5,280 feet or 1,609.344 meters) above sea level, making it one of the highest major cities in the United States. The 105th meridian west of Greenwich, the longitudinal reference for the Mountain Time Zone, passes directly through Denver Union Station.
Denver is ranked as a beta world city by the Globalization and World Cities Research Network. With a 2013 estimated population of 649,495, Denver ranks as the 22nd-most populous U.S. city. The 10-county Denver-Aurora-Lakewood, CO Metropolitan Statistical Area had an estimated 2013 population of 2,697,476 and ranked as the 21st most populous U.S. metropolitan statistical area. The 12-county Denver-Aurora, CO Combined Statistical Area had an estimated 2013 population of 3,277,309, which ranks as the 16th most populous U.S. metropolitan area.
Denver is the most populous city of the Front Range Urban Corridor, an oblong urban region stretching across three states with population of 5,467,633 in 2010. Denver is the most-populous city within a 500-mile (800 km) radius and the third most-populous city in the Mountain West and the Southwestern United States after Phoenix, Arizona and El Paso, Texas.
As of the 2010 census, the population of the City and County of Denver was 600,158, making it the 24th most populous U.S. city. The Denver-Aurora-Lakewood, CO Metropolitan Statistical Area had an estimated 2013 population of 2,697,476 and ranked as the 21st most populous U.S. metropolitan statistical area, and the larger Denver-Aurora-Boulder Combined Statistical Area had an estimated 2013 population of 3,277,309 and ranked as the 16th most populous U.S. metropolitan area. Denver is the most populous city within a radius centered in the city and of 550 miles (885 km) magnitude. Denverites is a term used for residents of Denver.
According to the 2010 census, the City and County of Denver contains 600,158 people and 285,797 households. The population density is 3,698 inhabitants per square mile (1,428/km²) including the airport. There are 285,797 housing units at an average density of 1,751 per square mile (676/km²).
However, the average density throughout most Denver neighborhoods tends to be higher. Without the 80249 zip code (47.3 sq mi, 8,407 residents) near the airport, the average density increases to around 5,470 per square mile.