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Millbrook Township, Peoria County, Illinois

Township in Peoria County, Illinois · ZIP 61451, 61517, 61529

  • Peoria County
  • Census data · ACS 2019-2023
Join Millbrook TownshipAsk Millbrook TownshipBusinessesPeople
  • 400 (2024 estimate)Population
  • 134Households
  • $72,778Median household income
  • $124,200Median home value
  • 4ZIP codes

About Millbrook Township

This page shows only what has been published about Millbrook Township: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.

Town intelligenceOfficial sources, refreshed yearly

Population, 2000 to 2020−14.5%
4004254504755002000: 49020002010: 48820102020: 4192020490419
Population of Millbrook Township at each census
CensusPopulation
2000490
2010488
2020419

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2000 Summary File 1: total population, county subdivision level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county subdivision level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county subdivision level, state 17, retrieved November 14, 2026.

Household income in Millbrook Township
Under $50k43.3%
$50k to $100k29.1%
$100k to $150k7.5%
$150k to $200k0%
$200k and over20.1%

Median household income $72,778 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county subdivision level, state 17, retrieved November 14, 2026.

Housing tenure in Millbrook Township
Owner occupied
115 units
Renter occupied
19 units
Vacancy rate
24.3%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, county subdivision level, state 17, retrieved November 14, 2026.

Millbrook Township compared with its county and state
Millbrook Township compared with its county and state, American Community Survey 2019-2023
MeasureMillbrook TownshipPeoria CountyIllinois
Population366179,83112,692,653
Median household income$72,778$64,938$81,702
Median age50.038.138.9
Median home value$124,200$152,600$250,500
Bachelor’s degree or higher22.0%34.5%37.2%
Foreign-born residents0.0%6.9%14.4%
Owner-occupied homes85.8%67.0%66.8%
Mean commute to work19.4 minutes18.9 minutes28.1 minutes

Source: American Community Survey 5-year data profile 2019–2023, county subdivision level, state 17, retrieved November 14, 2026.

CommunityRules and moderation

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Schools

No public school is listed for Millbrook Township: either the NCES directory for Illinois is not loaded yet, or no school's address falls inside Millbrook Township’s boundary. Schools in neighbouring towns are on their pages.

Legislative districts

Legislative districts for Millbrook Township3
Congressional and state legislative districts for Millbrook Township
ChamberDistrict
U.S. House of RepresentativesCongressional District 16 (IL-16)
State legislature, lower chamberState House District 93
State legislature, upper chamberState Senate District 47

Boundaries from the Census Bureau’s TIGER/Line district files, matched to Millbrook Township’s own boundary. Who holds each seat appears on the People page once the official records are approved.

Sources: Census cartographic boundaries 2025: congressional districts, 119th Congress, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, upper chamber, state 17, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 17, retrieved November 14, 2026.

Frequently asked about Millbrook TownshipPromoted from questions people asked

No question about Millbrook Township has been asked often enough to publish an answer yet. Ask Millbrook Township and the answer, once a person checks it, appears here.

Nearby towns

Other towns in Peoria County

All towns in Peoria County

Other places named Millbrook in Illinois