Northbrook, IL population, income and ZIP codes

Northbrook village is a small city in Illinois, with 34,642 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #54 of 1,462 ranked by population — larger than 96% of them. The median age here is 49.2 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 Northbrook village earn a median of $155,321 a year, 97.8% above the national figure of $78,538 and 109% above the $74,244 median for the 698 Illinois cities we cover. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 4.5% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Northbrook village is valued at $644,100, 112.3% above the national figure and 260% above the $179,100 peer median, while median gross rent runs $2,334 a month, 66% above the national figure, or roughly $28,008 across a full year. A household on the local median income would put about 18% 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 4.1×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 86.6% 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.

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.