In 2021, Flat Rock, IL had a population of 414 people with a median age of 34.4 and a median household income of $42,000. Between 2020 and 2021 the population of Flat Rock, IL declined from 464 to 414, a −10.8% decrease and its median household income grew from $41,071 to $42,000, a 2.26% increase.
The 5 largest ethnic groups in Flat Rock, IL are White (Non-Hispanic) (98.8%), Two+ (Non-Hispanic) (1.21%), 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 2021, the median property value in Flat Rock, IL was $53,100, and the homeownership rate was 90%.
Most people in Flat Rock, IL drove alone to work, and the average commute time was 28 minutes. The average car ownership in Flat Rock, IL was 2 cars per household.