Illinois City, IL population, income and ZIP codes

Illinois City CDP is a very small community in Illinois, with 18 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #1437 of 1,462 ranked by population — larger than 1% of them. The median age here is not published. 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 Illinois City CDP earn a median of not published a year. 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 0% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Illinois City CDP is valued at not published, while median gross rent runs not published a month. 100% 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 18 residents, a handful of survey responses moves every median on this page. Compare Illinois City CDP against its county rather than against national figures.

The Census withheld household income, home value, gross rent for Illinois City CDP because the sample was too thin to publish at this geography. Those values were suppressed at the source, not lost in our dataset, and we do not model a replacement. Everything else on this page comes straight from the ACS 2019-2023 ACS 5-year tables.