Boundary Atlas

ZIP code 62239: Dupo, IL

ZIP code 62239 is in Dupo (82% of residents), in St. Clair County, Illinois. 18% of its residents live outside city limits. It is in Illinois's 13th congressional district (94%) and Illinois's 12th congressional district (6.1%). Its state senate district is State Senate District 57; its state house district is State House District 114.

4,638residents (2020 Census)
8.5 sq miland area
1cities and towns
2congressional districts
8voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Dupo82%

CountyShare of ZIP residents
St. Clair County100%

Town or county subdivisionShare of ZIP residents
Sugar Loaf township95%
Centreville township4.8%

Congressional districts

Congressional districtShare of ZIP residents
Illinois's 13th congressional district (IL-13)94%
Illinois's 12th congressional district (IL-12)6.1%

This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IL-13)Nikki Budzinski (D)202-225-237194%
U.S. Representative (IL-12)Mike Bost (R)202-225-56616.1%
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 57)Christopher Belt (Democratic)618-875-1212100%
State Representative (State House District 114)Kevin Schmidt (R)618-215-1050100%

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 ZIP residents
State Senate District 57100%

State house districtShare of ZIP residents
State House District 114100%

Voting precincts

8 voting precincts overlap ZIP 62239. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:62239")

ZIP 62239 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.