Village in DuPage County, Illinois
Oak Brook
District lines run through Oak Brook, so who represents you here depends on your street. Search your address to see yours.
Who lives in Oak Brook
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 8,100
- Median age
- 55.2 years
- Under 18
- 18%
- 65 and over
- 34%
- Veterans, of adults
- 4%
- Speak another language at home
- 33%
Race and ethnicity
- Hispanic or Latino, of any race
- 6%
- White, not Hispanic
- 59%
- Black, not Hispanic
- under 1%
- Asian, not Hispanic
- 33%
Income and housing
- Median household income
- $175,900
- Below the poverty line
- 7%
- Bachelor's or higher, adults 25+
- 66%
- Owner-occupied homes
- 91%
- Median home value
- $903,000
2024 vote for president
Not counted for Oak Brook on its own: its precincts follow township lines, not the town’s. See the figure for DuPage County.
Represent all of Oak Brook
Represent part of Oak Brook
Each represents the part of Oak Brook inside their district. Under each is how many people lived in that part at the 2020 Census, of 8,163 in all.
Jesús G. "Chuy" GarcíaU.S. Representative, District 4, Democratic4,185 people in this part
Sean CastenU.S. Representative, District 6, Democratic3,978 people in this part- KLKimberly LightfordState Senator, District 4, Democratic2,424 people in this part
- LELaura EllmanState Senator, District 21, Democratic0 people in this part
- SHSuzy Glowiak HiltonState Senator, District 23, Democratic5,739 people in this part
- CWChris WelchState Representative, District 7, Democratic2,424 people in this part
- MDMargaret DeLaRosaState Representative, District 42, Democratic0 people in this part
- MDMarti DeuterState Representative, District 45, Democratic5,739 people in this part
Oak Brook's districts (8)
U.S. House (2)
- U.S. House District 4
Held by Jesús G. "Chuy" García, Democratic
Part of Oak Brook: 4,185 people in 2020
- U.S. House District 6
Held by Sean Casten, Democratic
Part of Oak Brook: 3,978 people in 2020
Illinois Senate (3)
- Illinois Senate District 4
Held by Kimberly Lightford, Democratic
Part of Oak Brook: 2,424 people in 2020
- Illinois Senate District 21
Held by Laura Ellman, Democratic
Part of Oak Brook: 0 people in 2020
- Illinois Senate District 23
Held by Suzy Glowiak Hilton, Democratic
Part of Oak Brook: 5,739 people in 2020
Illinois House (3)
- Illinois House District 7
Held by Chris Welch, Democratic
Part of Oak Brook: 2,424 people in 2020
- Illinois House District 42
Held by Margaret DeLaRosa, Democratic
Part of Oak Brook: 0 people in 2020
- Illinois House District 45
Held by Marti Deuter, Democratic
Part of Oak Brook: 5,739 people in 2020
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.