Millbrook, IL
Population 298 · Illinois
About Millbrook, IL
Millbrook is a small community in Illinois with a population of 298 residents. The median household income is $128,750 per year, which is above the national average. The median age in Millbrook is 38.9 years.
Housing in Millbrook has a median home value of $350,000 and median monthly rent of $1,100. Of the 107 total housing units, the majority are owner-occupied, with 96 owner-occupied and 6 renter-occupied units.
The unemployment rate in Millbrook is 2.6% and the poverty rate is 6.7%. 42.1% of residents hold a bachelor's degree or higher. The average commute time is 38.6 minutes.
Cost of Living in Millbrook, IL
Compared to national averages, Millbrook has a median household income of $128,750 (71% above the national median of $75,149). Home values average $350,000, which is 43% above the national median. Monthly rent at $1,100 is 5% below the US average of $1,163. Within Illinois, Millbrook's income is 72% above the state average of $75,072, and home values are 111% above the state median of $165,779.
Why Live in Millbrook, IL?
Millbrook offers a strong local economy with a median household income of $128,750, well above the national average, and rent that’s lower than the national average at $1,100/month, and a strong job market with an unemployment rate of just 2.6%. Additionally, the city features a well-educated community where 42.1% of residents hold a bachelor’s degree or higher, and a low poverty rate of 6.7%, better than the national average.
Millbrook has a population of 298 with a median age of 38.9 years. Compare Millbrook with other cities to see how it stacks up, or explore all cities in Illinois.
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Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Millbrook
What is the population of Millbrook, IL?
The population of Millbrook, IL is 298 according to the latest Census data.
What is the median household income in Millbrook?
The median household income in Millbrook, IL is $128,750 per year.
What is the median home value in Millbrook?
The median home value in Millbrook, IL is $350,000.
What is the average rent in Millbrook?
The median monthly rent in Millbrook, IL is $1,100.
What is the unemployment rate in Millbrook?
The unemployment rate in Millbrook, IL is 2.6%.