In 2023, Flat Rock, IL had a population of 362 people with a median age of 37.7 and a median household income of $49,881. Between 2022 and 2023 the population of Flat Rock, IL declined from 455 to 362, a −20.4% decrease and its median household income declined from $52,625 to $49,881, a −5.21% decrease.
The 5 largest ethnic groups in Flat Rock, IL are White (Non-Hispanic) (97.8%), Two+ (Non-Hispanic) (2.21%), White (Hispanic) (0%), Black or African American (Non-Hispanic) (0%), and Black or African American (Hispanic) (0%).
None of the households in Flat Rock, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Flat Rock, IL are U.S. citizens.
In 2023, the median property value in Flat Rock, IL was $56,700, and the homeownership rate was 87.2%.
Most people in Flat Rock, IL drove alone to work, and the average commute time was 27.6 minutes. The average car ownership in Flat Rock, IL was 2 cars per household.