Boundary Atlas

Oakbrook Terrace, Illinois

Oakbrook Terrace is a city in DuPage County, Illinois, with 2,753 residents in 2020. It is in Illinois's 6th congressional district. It spans 2 state house districts. Its state senate district is State Senate District 23.

2,753residents (2020 Census)
1.3 sq miland area
2ZIP codes
1congressional district

County

CountyShare of residents
DuPage County100%

Congressional district

Congressional districtShare of residents
Illinois's 6th congressional district (IL-06)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IL-06)Sean Casten (D)202-225-4561100%
U.S. SenatorRichard J. Durbin (D)202-224-2152 · contact formstatewide
U.S. SenatorTammy Duckworth (D)202-224-2854 · contact formstatewide
State Senator (State Senate District 23)Suzy Glowiak Hilton (Democratic)630-785-3177100%
State Representative (State House District 46)Diane Blair-Sherlock (Democratic)630-415-352053%
State Representative (State House District 45)Marti Deuter (Democratic)630-413-108047%

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of residents
State Senate District 23100%

State house districtShare of residents
State House District 4653%
State House District 4547%

ZIP codes

Percentages mark ZIPs only partly in Oakbrook Terrace: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Oakbrook Terrace's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:1754560")

Oakbrook Terrace here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.