Boundary Atlas

ZIP code 61570: Washburn, IL

ZIP code 61570 is in Washburn (60% of residents), in Woodford County (80%) and Marshall County (20%), Illinois. 40% 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 district is State House District 105.

1,720residents (2020 Census)
69.0 sq miland area
2cities and towns
1congressional district
7voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Washburn60%
La Rose0.2%

CountyShare of ZIP residents
Woodford County80%
Marshall County20%

Town or county subdivisionShare of ZIP residents
Cazenovia township68%
Richland township15%
Linn township7.1%
Partridge township4.6%
Bell Plain township3.6%
Lacon township2.2%

Congressional district

Congressional districtShare of ZIP residents
Illinois's 16th congressional district (IL-16)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IL-16)Darin LaHood (R)202-225-6201100%
U.S. SenatorRichard J. Durbin (D)202-224-2152 · contact formstatewide
U.S. SenatorTammy Duckworth (D)202-224-2854 · contact formstatewide
State Senator (State Senate District 53)Chris Balkema (R)815-844-9179100%
State Representative (State House District 105)Dennis Tipsword (R)815-844-9344100%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 53100%

State house districtShare of ZIP residents
State House District 105100%

Voting precincts

7 voting precincts overlap ZIP 61570. 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:61570")

ZIP 61570 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.