Naperville (/ˈneɪpərˌvɪl/) is a city in DuPage and Will counties in the U.S. state of Illinois. Located 28 miles (45 km) west of Chicago, Naperville was founded in 1831 and developed into the fifth-largest city in Illinois. As of the 2010 census, the city had a population of 141,853, which was estimated to have increased to 147,682 by 2017.
There were 141,122 people, 53,408 households, and 36,289 families residing in the city. As of April 2016, Naperville was the 176th most populous city in the United States.
According to the 2016 American Community Survey, the population density was 3708.8 inhabitants per square mile. There were 53,408 housing units. The racial makeup of the city was 76.5% White, 4.7% African American, 14.9% Asian and 5.3 Hispanic or Latino.
There were 48,655 households out of which 45.3% had children under the age of 18 living with them, 70.0% were married couples living together, 6.2% had a female householder with no husband present, and 23.7% were non-families. 17.8% of all households were made up of individuals and 3.9% had someone living alone who was 65 years of age or older. The average household size was 3.04 and the average family size was 3.55.
In the city, the population was spread out with 30.2% under the age of 18, 7.6% from 18 to 24, 29.4% from 25 to 44, 26.7% from 45 to 64, and 6.1% who were 65 years of age or older. The median age was 35.9 years. For every 100 females, there were 95.9 males. For every 100 females age 18 and over, there were 95.2 males.
The median income for a household in the city was $105,585, and the median income for a family was $130,164. Males had a median income of $82,515 versus $46,533 for females. The per capita income for the city was $48,239. About 2.5% of the population was below the poverty line, including 1.2% of those under age 18 and 9.1% of those age 65 or over.
In 2011, 14.9% of Naperville’s residents were Asian, making it the Chicago suburb with the tenth highest percentage of Asians.