Boundary Atlas

ZIP code 61334: Lostant, IL

ZIP code 61334 is in Lostant (66% of residents), in LaSalle County (94%) and Putnam County (5.9%), Illinois. 34% of its residents live outside city limits. It is in Illinois's 16th congressional district. Its state senate district is State Senate District 53; its state house districts are State House District 105 (94%) and State House District 106 (6.2%).

642residents (2020 Census)
39.0 sq miland area
1cities and towns
1congressional district
3voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Lostant66%

CountyShare of ZIP residents
LaSalle County94%
Putnam County5.9%

Town or county subdivisionShare of ZIP residents
Hope township88%
Richland township6.2%
Magnolia township5.9%

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 53100%

State house districtShare of ZIP residents
State House District 10594%
State House District 1066.2%

Voting precincts

3 voting precincts overlap ZIP 61334. 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:61334")

ZIP 61334 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.