Naperville, IL population, income and ZIP codes

Naperville city is a mid-size city in Illinois, with 149,424 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #4 of 1,462 ranked by population — larger than 99% of them. The median age here is 40.1 years against 39.1 nationally, a slightly older profile than the country as a whole. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Naperville city earn a median of $150,937 a year, 92.2% above the national figure of $78,538 and 103% above the $74,244 median for the 698 Illinois cities we cover. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 4.4% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Naperville city is valued at $509,900, 68.1% above the national figure and 185% above the $179,100 peer median, while median gross rent runs $1,852 a month, 31.7% above the national figure, or roughly $22,224 across a full year. A household on the local median income would put about 14.7% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 3.4×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 74.3% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

Every value on this page is published directly by the Census for this area — nothing is modelled or interpolated. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.