ZIP code 61451: Millbrook, IL
ZIP code 61451 is in Peoria County, Illinois, outside any city or Census-designated place. It is in Illinois's 16th congressional district. Its state senate district is State Senate District 47; its state house district is State House District 93.
See it on the mapAll of Illinois
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Peoria County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Millbrook township | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Illinois's 16th congressional district (IL-16) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-16) | Darin LaHood (R) | 202-225-6201 | 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 47) | Neil Anderson (R) | 309-230-7584 | 100% |
| State Representative (State House District 93) | Travis Weaver (R) | 309-204-6514 | 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
- Peoria County website: https://www.peoriacounty.gov/
- Peoria County laws: search for the Peoria County, Illinois code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 47 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 93 | 100% |
Voting precincts
1 voting precinct overlap ZIP 61451. 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:61451")
ZIP 61451 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.