Northfield, IL population, income and ZIP codes

Northfield village is a mid-size town in Illinois, with 5,683 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #318 of 1,462 ranked by population — larger than 78% of them. The median age here is 50.5 years against 39.1 nationally, a markedly older profile that usually tracks retirees staying put and younger households leaving for work. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in Northfield village earn a median of $180,492 a year, 129.8% above the national figure of $78,538 and 143% above the $74,244 median for the 698 Illinois cities we cover. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 5.2% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Northfield village is valued at $807,700, 166.2% above the national figure and 351% above the $179,100 peer median, while median gross rent runs $2,917 a month, 107.5% above the national figure, or roughly $35,004 across a full year. A household on the local median income would put about 19.4% 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 4.5×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 91.7% of occupied homes are owner-occupied versus 65% nationally, an owner-dominated market where rental listings are scarce and rent medians rest on a thin sample. 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.

A median age of 50.5 puts Northfield village well into retirement-weighted territory, which pulls median household income down even where household wealth is high, because retirement draws are counted differently from wages.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. 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.