Boundary Atlas

ZIP code 61331: Lee Center, IL

ZIP code 61331 is in Lee Center, in Lee County, Illinois. It is in Illinois's 16th congressional district. Its state senate district is State Senate District 37; its state house district is State House District 74.

34residents (2020 Census)
0.0 sq miland area
1cities and towns
1congressional district
1voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Lee Center100%

CountyShare of ZIP residents
Lee County100%

Town or county subdivisionShare of ZIP residents
Lee Center township100%

Congressional district

Congressional districtShare of ZIP residents
Illinois's 16th congressional district (IL-16)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 37100%

State house districtShare of ZIP residents
State House District 74100%

Voting precincts

1 voting precinct overlap ZIP 61331. Map them, with each precinct's share of the ZIP's residents.

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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:61331")

ZIP 61331 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.