Millbrook Flag

Millbrook

County:
Kendall County
County Seat:
No
Area (mi²):
36.535
State:
Illinois

Millbrook is located in Kendall County, Illinois. Millbrook has a 2025 population of 402 . Millbrook is currently growing at a rate of 0.5% annually but its population has decreased by -0.99% since the most recent census, which recorded a population of 406 in 2020.

The average household income in Millbrook is $91,825 with a poverty rate of 5.74%. The median age in Millbrook is 50 years: 54.1 years for males, and 41.8 years for females. For every 100 females there are 71.8 males.

402
Total Population
11
Density (mi²)
2 0.5%
Growth

Millbrook Population

Millbrook Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Millbrook includes 99.18% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

White (99.18%)

Two or more races (0.82%)

Race
Population
Percentage (of total)
White36399.18%
Two or more races30.82%

Millbrook Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Millbrook's average per capita income is $47,813. Household income levels show a median of $72,778. The poverty rate stands at 5.74%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$95,750-
Families$73,942$108,870
Households$72,778$91,825
Non Families-$23,831

$47,813

Average Income

$72,778

Median Household Income

5.74%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)