Boundary Atlas

ZIP code 61415: Avon, IL

ZIP code 61415 is in Avon (43% of residents), in Fulton County (66%) and Warren County (34%), Illinois. 57% of its residents live outside city limits. It is in Illinois's 17th congressional district (66%) and Illinois's 15th congressional district (34%). Its state senate districts are State Senate District 47 (66%) and State Senate District 36 (34%); its state house districts are State House District 94 (66%) and State House District 71 (34%).

1,623residents (2020 Census)
108.7 sq miland area
1cities and towns
2congressional districts
7voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Avon43%

CountyShare of ZIP residents
Fulton County66%
Warren County34%

Town or county subdivisionShare of ZIP residents
Union township55%
Greenbush township32%
Lee township10%
Ellisville township1.3%
Swan township1.2%
Roseville township0.5%
Berwick township0.3%

Congressional districts

Congressional districtShare of ZIP residents
Illinois's 17th congressional district (IL-17)66%
Illinois's 15th congressional district (IL-15)34%

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.

State legislative districts

State senate districtShare of ZIP residents
State Senate District 4766%
State Senate District 3634%

State house districtShare of ZIP residents
State House District 9466%
State House District 7134%

Voting precincts

7 voting precincts overlap ZIP 61415. 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:61415")

ZIP 61415 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.