Illiopolis, IL population, income and ZIP codes

Illiopolis village is a very small community in Illinois, with 854 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #742 of 1,462 ranked by population — larger than 49% of them. The median age here is 45.5 years against 39.1 nationally, a markedly older profile that usually tracks retirees staying put and younger households leaving for work. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in Illiopolis village earn a median of $74,219 a year, 5.5% below the national figure of $78,538 and within a couple of points of the $74,244 median for the 698 Illinois cities we cover. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 4.3% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Illiopolis village is valued at $96,500, 68.2% below the national figure and 46% below the $179,100 peer median, while median gross rent runs $675 a month, 52% below the national figure, or roughly $8,100 across a full year. A household on the local median income would put about 10.9% 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 1.3×, against roughly 3.9× nationally, so purchase prices are unusually low against local pay, the pattern in places where supply is plentiful and wage growth has been flat. 80.1% 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. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

With 854 residents, a handful of survey responses moves every median on this page. Compare Illiopolis village against its county rather than against national figures.

All values below were released by the Census for this exact geography, with no gap-filling on our side. 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.