Aurora, a suburb of Chicago, is a city in DuPage, Kane, Kendall, and Will counties in the U.S. state of Illinois. Located primarily in DuPage and Kane counties, it is an outer suburb of Chicago and the second most populous city in the state, and the 115th most populous city in the country. The population was 197,899 at the 2010 census, and was estimated to have increased to 199,602 by 2018.
Aurora is at 41°45′50″N 88°17′24″W / 41.76389°N 88.29000°W / 41.76389; -88.29000 (41.7637855, −88.2901352).
According to the 2010 census, Aurora has an area of 45.799 square miles (118.62 km), of which 44.94 square miles (116.39 km) (or 98.12%) is land and 0.859 square miles (2.22 km) (or 1.88%) is water.
While the city has traditionally been regarded as being in Kane County, Aurora also includes parts of DuPage, Kendall and Will counties. Aurora is one of only three cities in Illinois that span four counties. (The others are Barrington Hills and Centralia.)
As of the American Community Survey of 2016, there were 200,907 people, 61,831 households, and 46,131 families residing in the city. The population density was 4,389.5 inhabitants per square mile (1,694.8/km). There were 66,447 housing units at an average density of 1,451.8 per square mile (560.5/km). The racial makeup of the city was 56.5% White, 10.2% African American, 0.4% Native American, 7.7% Asian American, 0.1% Pacific Islander, 22.4% from other races, and 2.7% from two or more races. Hispanic or Latino of any race were 42.7% of the population.
There were 61,831 households out of which 46.3% had children under the age of 18 living with them, 54.4% were married couples living together, 13.9% had a female householder with no husband present, and 25.4% were non-families. 19.9% 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 3.12 and the average family size was 3.63 as of the 2010 census.
In the city, the population was spread out with 30.1% under the age of 18, 10.1% from 18 to 24, 30.5% from 25 to 44, 21.5% from 45 to 64, and 7.9% who were 65 years of age or older. The median age was 32.0 years. For every 100 females, there were 97.9 males. For every 100 females age 18 and over, there were 95.8 males.
The median income for a household in the city was $63,967, and the median income for a family was $72,696. For full-time workers, males had a median income of $48,296 versus $37,823 for females. The per capita income for the city was $26,989. About 11.1% of families and 14.0% of the population were below the poverty line, including 20.6% of those under age 18 and 8.8% of those age 65 or over.