Cahokia Heights, IL population, income and housing data

Cahokia Heights city is a mid-size town in Illinois, with 17,173 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #148 of 1,462 ranked by population — larger than 89% of them. The median age here is 32.8 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. 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 Cahokia Heights city earn a median of $37,975 a year, 51.6% below the national figure of $78,538 and 49% 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 32.7% of residents here, well above the 12.4% national rate, which is the single clearest signal in this dataset that median income here is carried by a narrow band of households.

The typical owner-occupied home in Cahokia Heights city is valued at $56,900, 81.2% below the national figure and 68% below the $179,100 peer median, while median gross rent runs $959 a month, 31.8% below the national figure, or roughly $11,508 across a full year. A household on the local median income would put about 30.3% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is a stretch on median earnings. The home-price-to-income ratio works out to 1.5×, 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. 52.6% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. 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.

Cahokia Heights city is the unusual combination of expensive to rent and cheap to buy: rent takes 30.3% of median income while homes cost only 1.5× it. Where that pattern shows up, the gap is normally down to down-payment and credit barriers rather than price.

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.