Flat Rock, IL population, income and ZIP codes

Flat Rock village is a very small community in Illinois, with 362 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #1031 of 1,462 ranked by population — larger than 29% of them. The median age here is 37.7 years against 39.1 nationally, a slightly younger profile than the country as a whole. 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 Flat Rock village earn a median of $49,881 a year, 36.5% below the national figure of $78,538 and 33% 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 14.4% of residents here, above the 12.4% national rate.

The typical owner-occupied home in Flat Rock village is valued at $56,700, 81.3% below the national figure and 68% below the $179,100 peer median, while median gross rent runs not published a month. The home-price-to-income ratio works out to 1.1×, 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. 87.2% 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.

With 362 residents, a handful of survey responses moves every median on this page. Compare Flat Rock village against its county rather than against national figures.

The Census withheld gross rent for Flat Rock village 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.