Photo: Dima Sergiyenko; Please attribute this image as the work of "DiscoverWithDima." · CC BY-SA 4.0Oak Brook spent more per resident in 2022 than 99% of similar cities
Oak Brook’s village government spent $34.3 million on day-to-day services in the year to December 31, 2024, about $4,277 per resident. Water and other utilities ($6.8 million) are counted separately.
What stands out about how Oak Brook is run
Read from the village’s budget and official records.
$3,145 per resident in 2022: more than 99% of them
Oak Brook’s day-to-day spending in 2022 ($3,145 per resident, hospital and utilities left out) against 166 Illinois cities of 2,500–9,999 that don’t run their own schools: the median was $880, and the middle half spent $696–$1,154. Oak Brook spent more than 99% of them.
Later years come from a Census sample, so the comparison stays on 2022. How Town Hall compares budgets →
Illinois cities of 2,500–9,999 that don’t run their own schools, 2022 Census of Governments (every government counted that year; Oak Brook itself left out).
About $4,277 per resident a year, or $11.72 a day
Day-to-day services only. The biggest line: police, at 36%.
Thank you for being a neighbor
Day-to-day spending is up 36% since 2022
Day-to-day services, in dollars, in the years Oak Brook reported to the Census Bureau. Prices rose too: about 4% a year in 2022–2024.
Day-to-day spending by fiscal year
Per resident: 2022: $3,145 · 2024: $4,277.
full-time in March 2025, up from 119 in 2022. Both are Census estimates.
Building projects, interest and enterprises (hospital, utilities) are left out, so a big construction year doesn’t read as growth.
Typical bills top $10,000 a year
Every local property tax on the home: town, schools and county.
Typical yearly bill next door and statewide
The Housing page’s calculator splits a monthly payment into loan, tax and insurance at Oak Brook’s rate.
Can I afford it? →The median bill homeowners report to the Census survey (bills of $10,000+ are reported as “$10,000+”). The effective rate is that bill ÷ the median home value: a rough guide, not the official tax rate.
Tax bills are one input to Oak Brook’s Cost of living grade. Cost of living in Oak Brook →
Who’s in charge in Oak Brook
Names change after every election, so we link to the source that keeps them current.
Oak Brook’s meeting calendar isn’t in our feed yet. The village posts agendas and minutes on oak-brook.org ↗.
One full-time village employee for every 64 residents
On the payroll in March 2025, from the Census Bureau’s Annual Survey of Public Employment & Payroll (a Census estimate). Residents: the Census population in the 2024 finance file (8,025).
By department full-time, plus part-time, March 2025
The Census reports one month’s payroll (March); yearly figures are that month × 12, an estimate. Part-timers count half in the bar lengths.
Hinsdale Township High School District 86
Oak Brook’s high school district, shared with Clarendon Hills, Willowbrook, Hinsdale, Burr Ridge, Darien and more. It’s its own government, with a budget separate from the town’s.
Of the $33,501 per pupil, $20,272 goes to the classroom (teachers, aides, supplies); the rest to buses, buildings, counselors and administration. Building projects and debt payments aren’t in the per-pupil figure.
Illinois districts overall: 52% local, 38% state, 10% federal.
Butler School District 53 · $34,706 per pupil
Community High School District 99 · $28,322 per pupil
Downers Grove Grade School District 58 · $21,709 per pupil
School year 2023–24. Census Bureau school finance survey.
Oak Brook’s votes are counted by county
Illinois reports official results by county and precinct, not by village, so there are no official results for Oak Brook alone, and we don’t estimate them. These are DuPage County’s results.
Kamala D HarrisDemocrat53.7%251,164 votes
Donald J TrumpRepublican40.9%191,243 votesOthers: 5.4% (25,483 votes).
Most votes in DuPage County: Kamala D Harris
Illinois: Harris 54.4%, Trump 43.5%
100% of Oak Brook lies in DuPage County. Every 2024 race in DuPage County is on the county’s page.
DuPage County’s 2024 results →Official 2024 general election returns, as certified (MIT Election Data + Science Lab). Percentages are of votes for candidates; blank and spoiled ballots aren’t counted. Candidates are listed by votes, and party colors are neutral on purpose.
Portraits: Kamala D Harris: official vice-presidential portrait, Lawrence Jackson, The White House, 2021; Donald J Trump: official portrait, Shealah Craighead, The White House, 2017. All are U.S. government works in the public domain. A race shows photos only when every candidate has an official portrait; otherwise every candidate in it gets initials.
From town hall to Washington
Every level of government that speaks for Oak Brook.
- 1Your cityMayor & councilOfficials: oak-brook.org ↗
- 2Illinois HouseOak Brook is split between 2 districts
- 3Illinois SenateState senator
- 4GovernorStatewide
- 5U.S. HouseSplit between districts
- 6U.S. SenateBoth represent all of Illinois
Democrat · Republican · other or independent. Tap a name for their official page.
How Oak Brook compares with the towns next door
Oak Brook spent $3,145 per resident in 2022; the 8 neighbors that reported 2022 spent $31 to $4,823. Towns that run more services spend more. Tap a town to see its page.
| Town | Day-to-day, per resident (2022) | Tax bill |
|---|---|---|
| Proviso Township | $31 | $6,477 |
| Downers Grove Township | $33 | $7,829 |
| York Township | $60 | $7,724 |
| Westmont | $1,267 | $6,819 |
| Downers Grove | $1,293 | $7,227 |
| Elmhurst | $1,449 | $9,466 |
| Lombard | $1,770 | $7,071 |
| Oakbrook Terrace | $4,823 | $6,891 |
| Hinsdale | estimate | $10,000+ |
| Oak Brook | $3,145 | $10,000+ |
Day-to-day spending in 2022, the last year every government was counted, for governments that reported it; hospital and utilities left out. Tax bill: the typical homeowner’s bill (Census ACS, 2020–24).
Reach Oak Brook’s government
The official site has phone numbers, hours and forms. Neighbors add the rest to the Handbook.
Questions about Oak Brook’s government
How much does Oak Brook spend per resident?
About $4,277 per resident on day-to-day services in the year to December 31, 2024, as reported to the Census Bureau. In 2022, the last full count, its $3,145 was more than 99% of 166 Illinois cities of 2,500–9,999 that don’t run their own schools.
Who runs Oak Brook’s government?
See oak-brook.org for current officials. We name an official only when a public source lists a current term, and none does for Oak Brook yet.
How did Oak Brook vote in 2024?
Illinois counts votes by county and precinct, not by village, so there are no official results for Oak Brook alone. DuPage County, where 100% of Oak Brook lies, voted Harris 53.7%, Trump 40.9% for president; its page has every race.
How many people work for Oak Brook?
125 full-time and 53 part-time employees in March 2025, with a March payroll of $1.4M (about $16.7M a year if every month were the same); Census Bureau estimates.
Who represents Oak Brook in the state legislature?
Oak Brook is split among 2 State House districts and 2 State Senate districts, so your address decides. The Illinois Legislature’s lookup finds yours. Listed by Open States; districts from the Census Bureau.
Ask neighbors about Oak Brook’s government
Neighbors who’ve been to the meetings can help.
Budget and staff: U.S. Census Bureau, Census of Governments (2022, every government) and Annual Survey of State and Local Government Finances (2023–24, a sample) and the Annual Survey of Public Employment & Payroll; day-to-day spending is current operations, with hospitals, utilities and airports apart. School district: Census school finance survey, 2023–24. Property tax: Census American Community Survey, 2020–24. Elections: official 2024 returns via the MIT Election Data + Science Lab; turnout uses Census citizen voting-age population (CVAP, 2020–24). Officials: Open States, names shown only with a current term (checked October 9, 2026). Districts: Census Bureau (119th Congress, 2024 state districts); legislators: Open States and congress-legislators. How Town Hall works →