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Naperville is an affluent city in DuPage and Will counties in Illinois in the United States, voted the second best place to live in the United States by Money Magazine in 2006. As of the 2000 census, the city had a total population of 128,358, and the population was estaimated at 147,779 in 2006. Naperville is the fifth largest city in the state, behind Chicago, neighboring Aurora, Rockford, and Joliet. Approximately 100,000 Napervillians live in DuPage County, while about 50,000 reside in Will County.
Once a quaint farming town, Naperville has evolved into a wealthy city due in part to a massive migration of professionals in the 1990's seeking jobs and globally renowned public schools. This can be seen in part by the enormous growth of high-tech companies such as Tellabs, Lucent Technologies and the BP North American Chemical Headquarters, all located in Naperville. With 150,000 Napervillians averaging $150,000 family incomes, the construction of thousands of multimillion dollar houses across the city has resulted, making Naperville the wealthiest city (with a population of 90,000 and over) in the entire country. U.S. News and World Report recently ranked both Naperville School District 203 high schools among the top 3 percent of high schools in the country. Also, District 204's Neuqua Valley High School and Waubonsie Valley High School won the Grammy Gold Signature School award in 2005 and 2007 respectively, ranking them top in the nation for a music program in a high school.
According to the 2005 American Community Survey, there were 147,779 people, 48,655 households, and 37,143 families residing in the city; as of 2006-07-01, Naperville is the 164th most populous city in the United States. The population density was 4,162.8 people per square mile (1,606.3/km²). There were 51,636 housing units at an average density of 1454.5/sq mi (561.3/km²). The racial makeup of the city was 82.00% White, 2.54% African American, 0.07% Native American, 12.65% Asian, 0.00% Pacific Islander, 1.26% from other races, and 1.48% from two or more races. Hispanic or Latino of any race were 4.23% of the population.
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 $110,858, and the median income for a family was $122,454 . Males had a median income of $87,527 versus $51,586 for females. The mean, or average, income for a family in Naperville was $148,316 according to the 2005 census. The per capita income for the city was $44,235. 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.
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