Aurora (/əˈroʊrə/, /əˈrɔːrə/) is a Home Rule Municipality in the U.S. state of Colorado, spanning Arapahoe and Adams counties, with the extreme southeastern portion of the city extending into Douglas County. Aurora is one of the principal cities of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area (Metro Denver). The city’s population was 325,078 in the 2010 census, which made it the third most populous city in the state of Colorado and the 54th most populous city in the United States.
Aurora is located adjacent to the east side of Denver. The city’s official elevation, posted on signs at the city limits, is 5,471 feet (1,668 m). However, the city spans a difference in elevation of nearly 1,000 feet (300 m). The lowest elevation of 5,285 feet (1,611 m) is found at the point where Sand Creek crosses the city limit in the northwest corner of the city, while the highest elevation of 6,229 feet (1,899 m) is on the extreme southern border of the city in Douglas County, near the intersection of Inspiration and Gartrell roads.
As of the 2000 census, the city had a total area of 142.7 square miles (370 km), of which 142.5 square miles (369 km) was land and 0.2 square miles (0.52 km), or 0.17%, was water. By 2010, the city had grown to 154.7 square miles (401 km), surpassing Denver’s 153.0 square miles (396 km) and ranking as the 54th largest U.S. city in land area.
As of the 2010 census, there were 325,078 people, 121,191 households, and 73,036 families residing in the city. The population density was 1,939.6 inhabitants per square mile (748.9/km). There were 131,040 housing units at an average density of 766.7 per square mile (296.0/km). The racial makeup of the city was 61.1% White, 15.7% African American, 4.9% Asian (1.1% Korean, 0.8% Vietnamese, 0.5% Filipino, 0.5% Chinese, 0.5% Indian, 0.2% Japanese, 0.1% Thai, 0.1% Cambodian, 0.1% Burmese, 0.1% Nepalese, 0.1% Pakistani, 0.1% Indonesian), 1.0% Native American, 0.3% Pacific Islander, 11.6% from other races, and 5.2% from two or more races. Hispanic or Latino of any race were 28.7% of the population; 21.9% of Aurora’s population is of Mexican heritage, 1.0% Salvadoran, 0.7% Puerto Rican, 0.4% Guatemalan, 0.3% Honduran, 0.3% Peruvian, 0.2% Cuban, 0.2% Colombian and 0.1% Nicaraguan . Non-Hispanic Whites were 47.3% of the population in 2010, compared to 85.1% in 1980.
Aurora is a center of Colorado’s refugee population. There are about 30,000 Ethiopians and Eritreans living in the Denver-Aurora area. There is also a sizable population of Nepalese refugees.
There were 121,191 households out of which 35.5% had children under the age of 18 living with them, 46.9% were married couples living together, 13.1% had a female householder with no husband present, and 34.8% were non-families. 27.4% of all households were made up of individuals and 5.7% had someone living alone who was 65 years of age or older. The average household size was 2.6 and the average family size was 3.2.
In the city, the population was spread out with 27.3% under the age of 18, 6.8% from 18 to 24, 37.6% from 25 to 44, 16.8% from 45 to 64, and 8.9% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 100.5 males. For every 100 females age 18 and over, there were 95.8 males.
The median income for a household in the city was $46,507, and the median income for a family was $52,551. Males had a median income of $35,963 versus $30,080 for females. The per capita income for the city was $21,095. About 6.8% of families and 8.9% of the population were below the poverty line, including 12.0% of those under age 18 and 6.1% of those age 65 or over.