Markham, IL population, income and ZIP codes

Markham city is a mid-size town in Illinois, with 11,434 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #204 of 1,462 ranked by population — larger than 86% of them. The median age here is 33.7 years against 39.1 nationally, a slightly younger profile than the country as a whole. 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 Markham city earn a median of $52,364 a year, 33.3% below the national figure of $78,538 and 29% below 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 18.9% 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 Markham city is valued at $119,500, 60.6% below the national figure and 33% below the $179,100 peer median, while median gross rent runs $1,689 a month, 20.1% above the national figure, or roughly $20,268 across a full year. A household on the local median income would put about 38.7% 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 2.3×, 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. 72% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

Markham city is the unusual combination of expensive to rent and cheap to buy: rent takes 38.7% of median income while homes cost only 2.3× it. Where that pattern shows up, the gap is normally down to down-payment and credit barriers rather than price.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. 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.