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CITY

Millbrook

Illinois · 291 residents (2025 est.) · 1.846 sq mi
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The short version

Millbrook is significantly wealthier than the US average, with a median household income of $137,560. Population has fallen 18% since 2023, a loss of 55 residents. Median home value is $361,900. With a median age of 55.3, the population is older than the US median of 38.9. Poverty is rare here, at 4.5% of residents. It ranks in the top 5% of US cities for household income.

At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 55.3
US median: 38.9
More educated
39% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
243
−18%since 2023
from 298 in 2023
2009 – 2025
Population density
132 / sq mi
−18%since 2023
from 161 / sq mi in 2023
US average: 281
Median age
55.3
+42%since 2023
from 38.9 in 2023
US average: 38.9

PEP 2025 EST:291 residents (Census Bureau Vintage 2025, released March 2026)

Population, 2009 – 2024
226277328378429200920202024Millbrook
2024243
200920202024
Section 02

Income & economy

Median household income
$137,560
+4%inflation adjusted, since 2023
from $128,750 in 2023
US average: $82,259
2009 – 2024
Per capita income
$47,507
+15%since 2023
from $41,266 in 2023
US average: $44,673
Households earning $100K+
75.3%
+2.7 ptssince 2023
from 72.5% in 2023
US average: 53.3%
Poverty rate
4.5%
−2.2 ptssince 2023
from 6.7% in 2023
US average: 12.5%
Income inequality (Gini)
0.268
+2%since 2023
from 0.263 in 2023
US average: 0.476
Workforce by industry, 2024
Wholesale trade35.7%
US avg: 6.9%
Information11.1%
US avg: 10.8%
Other services6.3%
US avg: 6.7%
Finance & insurance5.6%
US avg: 5.9%
Professional, scientific, technical4.8%
US avg: 5.1%
Transportation & warehousing4%
US avg: 2.2%
Retail trade2.4%
US avg: 9.9%
Public administration2.4%
US avg: 4.8%
Agriculture, forestry, fishing0.8%
US avg: 1.6%
Construction0.8%
US avg: 1.2%
Education & health services0.8%
US avg: 0.9%
Manufacturing0%
US avg: 0.4%
Arts, entertainment, food0%
US avg: 1.9%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$361,900
Unchangedinflation adjusted, since 2023
from $350,000 in 2023
US average: $376,019
2009 – 2024
Owner-occupied
99.0%
+4.9 ptssince 2023
from 94.1% in 2023
1.0% rent
Vacancy rate
6.7%
+2.1 ptssince 2023
from 4.7% in 2023
US average: 10.0%
Owner cost-burdened
15.6%
−3.1 ptssince 2023
from 18.8% in 2023
US average: 22.9%
Renter cost-burdened
100.0%
+83.3 ptssince 2023
from 16.7% in 2023
US average: 47.4%
Afford Score
2.6
−3%since 2023
from 2.7 in 2023
2009 – 2024
Gentrification Score
61
RELATED:See current rent listings in Millbrook on RentDataNow
Section 04

Race & ethnicity

2023
White, non-Hispanic98.7%(294)
Black0%(0)
Hispanic / Latino0.7%(2)
Asian0%(0)
Other0.7%(2)
Diversity Score3.3%(10)
2024
White, non-Hispanic93.4%(227)
Black0%(0)
Hispanic / Latino1.6%(4)
Asian0%(0)
Other4.9%(12)
Diversity Score15.6%(38)
Diversity Score
16
+369%since 2023
from 3 in 2023
2009 – 2024
Section 05

Education

Bachelor's degree or higher
39.4%
−2.7 ptssince 2023
from 42.1% in 2023
US average: 35.6%
High school or higher
96.0%
−0.3 ptssince 2023
from 96.3% in 2023
US average: 89.6%
Graduate degree
16.0%
−0.3 ptssince 2023
from 16.3% in 2023
US average: 14.0%
Section 06

Commute & transportation

Average commute
37.0 min
−4%since 2023
from 38.6 min in 2023
US average: 26.5
Drive alone to work
91.2%
−1.2 ptssince 2023
from 92.4% in 2023
US average: 68.9%
Carpooled to work
3.2%
+0.4 ptssince 2023
from 2.8% in 2023
US average: 8.5%
Public transit
0.0%
Unchangedsince 2023
from 0.0% in 2023
US average: 3.2%
Worked from home
2.4%
+0.3 ptssince 2023
from 2.1% in 2023
US average: 15.0%
Walked to work
1.6%
−0.5 ptssince 2023
from 2.1% in 2023
US average: 2.4%
Biked to work
0.8%
+0.8 ptssince 2023
from 0.0% in 2023
US average: 0.4%
No vehicle available
0.0%
Unchangedsince 2023
from 0.0% in 2023
US average: 8.3%
Section 07

Work & employment

Unemployment rate
2.3%
−0.3 ptssince 2023
from 2.6% in 2023
US average: 5.2%
Labor force participation
64.5%
−6.1 ptssince 2023
from 70.6% in 2023
US average: 63.5%
Self-employed
12.7%
−2.3 ptssince 2023
from 15.0% in 2023
US average: 13.1%
Management & professional
44.4%
−5.9 ptssince 2023
from 50.3% in 2023
US average: 42.5%
Section 08

People & community

Male
50.2%
+1.9 ptssince 2023
from 48.3% in 2023
Female
49.8%
−1.9 ptssince 2023
from 51.7% in 2023
Foreign born
0.8%
+0.5 ptssince 2023
from 0.3% in 2023
US average: 14.1%
Veterans
7.0%
+2.1 ptssince 2023
from 4.9% in 2023
US average: 6.2%
With a disability
6.2%
−1.5 ptssince 2023
from 7.7% in 2023
US average: 13.3%
Uninsured
0.8%
−1.5 ptssince 2023
from 2.3% in 2023
US average: 8.4%
Broadband at home
88.7%
−0.5 ptssince 2023
from 89.2% in 2023
US average: 91.0%
English only at home
97.3%
−1.2 ptssince 2023
from 98.5% in 2023
US average: 77.7%
Spanish at home
2.7%
+1.2 ptssince 2023
from 1.5% in 2023
US average: 13.6%
Drill deeper

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MILLBROOK VS
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MILLBROOK VS
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Frequently asked

How many people live in Millbrook, Illinois?

Millbrook, Illinois has about 243 residents according to the 2024 American Community Survey.

What is the median household income in Millbrook, Illinois?

The typical household in Millbrook, Illinois earns about $137,560 a year. Half of households make more than that, and half make less.

Is Millbrook, Illinois expensive?

In Millbrook, Illinois, the median home is worth about $361,900.

How educated are people in Millbrook, Illinois?

About 39.4% of adults age 25 and over in Millbrook, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Millbrook, Illinois?

About 4.5% of people in Millbrook, Illinois live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →