Boundary Atlas

ZIP code 62326: Colchester, IL

ZIP code 62326 is in Colchester (49% of residents), in McDonough County (99%) and Hancock County (1.4%), Illinois. 51% of its residents live outside city limits. It is in Illinois's 15th congressional district. Its state senate districts are State Senate District 47 (97%) and State Senate District 36 (2.6%); its state house districts are State House District 94 (97%) and State House District 71 (2.6%).

2,255residents (2020 Census)
77.3 sq miland area
1cities and towns
1congressional district
8voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Colchester49%

CountyShare of ZIP residents
McDonough County99%
Hancock County1.4%

Town or county subdivisionShare of ZIP residents
Colchester township69%
Chalmers township8.3%
Lamoine township5.8%
Tennessee township5.4%
Bethel township4.0%
Hire township3.4%
Emmet township2.6%
Hancock township1.4%

Congressional district

Congressional districtShare of ZIP residents
Illinois's 15th congressional district (IL-15)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IL-15)Mary E. Miller (R)202-225-5271100%
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 47)Neil Anderson (R)309-230-758497%
State Senator (State Senate District 36)Mike Halpin (Democratic)309-558-36122.6%
State Representative (State House District 94)Norine Hammond (R)309-836-270797%
State Representative (State House District 71)Dan Swanson (R)2.6%

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 4797%
State Senate District 362.6%

State house districtShare of ZIP residents
State House District 9497%
State House District 712.6%

Voting precincts

8 voting precincts overlap ZIP 62326. 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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:62326")

ZIP 62326 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.