In 2023, Millbrook, IL had a population of 298 people with a median age of 38.9 and a median household income of $128,750. Between 2022 and 2023 the population of Millbrook, IL declined from 314 to 298, a −5.1% decrease and its median household income grew from $116,875 to $128,750, a 10.2% increase.
The 5 largest ethnic groups in Millbrook, IL are White (Non-Hispanic) (98.7%), White (Hispanic) (0.671%), Two+ (Non-Hispanic) (0.671%), Black or African American (Non-Hispanic) (0%), and Black or African American (Hispanic) (0%).
None of the households in Millbrook, 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 Millbrook, IL are U.S. citizens.
In 2023, the median property value in Millbrook, IL was $350,000, and the homeownership rate was 94.1%.
Most people in Millbrook, IL drove alone to work, and the average commute time was 38.6 minutes. The average car ownership in Millbrook, IL was 3 cars per household.