Round Lake Park, IL population, income and ZIP codes

Round Lake Park village is a mid-size town in Illinois, with 7,833 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #270 of 1,462 ranked by population — larger than 81% of them. The median age here is 46.4 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 Round Lake Park village earn a median of $57,486 a year, 26.8% below the national figure of $78,538 and 23% below 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 11.5% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Round Lake Park village is valued at $157,900, 48% below the national figure and 12% below the $179,100 peer median, while median gross rent runs $1,320 a month, 6.1% below the national figure, or roughly $15,840 across a full year. A household on the local median income would put about 27.6% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 2.7×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 86.5% 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.