ZIP code 61435: Spring Grove, IL
ZIP code 61435 is in Warren County, Illinois, outside any city or Census-designated place. It is in Illinois's 17th congressional district. Its state senate district is State Senate District 36; its state house district is State House District 71.
See it on the mapAll of Illinois
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Warren County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Spring Grove township | 61% |
| Kelly township | 20% |
| Coldbrook township | 11% |
| Monmouth township | 7.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Illinois's 17th congressional district (IL-17) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-17) | Eric Sorensen (D) | 202-225-5905 | 100% |
| U.S. Senator | Richard J. Durbin (D) | 202-224-2152 · contact form | statewide |
| U.S. Senator | Tammy Duckworth (D) | 202-224-2854 · contact form | statewide |
| State Senator (State Senate District 36) | Mike Halpin (Democratic) | 309-558-3612 | 100% |
| State Representative (State House District 71) | Dan Swanson (R) | 100% |
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
- Warren County website: http://www.warrencountyil.com
- Warren County laws: search for the Warren County, Illinois code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 36 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 71 | 100% |
Voting precincts
4 voting precincts overlap ZIP 61435. 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:61435")
ZIP 61435 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.