Boundary Atlas

ZIP code 61361: Sheffield, IL

ZIP code 61361 is in Sheffield (61% of residents), in Bureau County (94%) and Henry County (5.7%), Illinois. 39% of its residents live outside city limits. It is in Illinois's 16th congressional district. Its state senate districts are State Senate District 37 (94%) and State Senate District 47 (5.7%); its state house districts are State House District 73 (94%) and State House District 93 (5.7%).

1,336residents (2020 Census)
88.8 sq miland area
1cities and towns
1congressional district
7voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Sheffield61%

CountyShare of ZIP residents
Bureau County94%
Henry County5.7%

Town or county subdivisionShare of ZIP residents
Concord township64%
Mineral township14%
Manlius township9.7%
Annawan township5.7%
Gold township5.2%
Fairfield township2.3%

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 3794%
State Senate District 475.7%

State house districtShare of ZIP residents
State House District 7394%
State House District 935.7%

Voting precincts

7 voting precincts overlap ZIP 61361. 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:61361")

ZIP 61361 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.