Boundary Atlas

ZIP code 61084: Stillman Valley, IL

ZIP code 61084 is in Stillman Valley (35% of residents), in Ogle County (96%) and Winnebago County (4.2%), Illinois. 65% of its residents live outside city limits. It is in Illinois's 16th congressional district. Its state senate district is State Senate District 45; its state house district is State House District 89.

3,036residents (2020 Census)
34.8 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Stillman Valley35%

CountyShare of ZIP residents
Ogle County96%
Winnebago County4.2%

Town or county subdivisionShare of ZIP residents
Marion township84%
Scott township12%
Rockford township4.2%
White Rock township0.3%

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 45)Andrew Chesney (R)815-232-0774100%
State Representative (State House District 89)Tony McCombie (R)815-291-8989100%

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 45100%

State house districtShare of ZIP residents
State House District 89100%

Voting precincts

6 voting precincts overlap ZIP 61084. 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:61084")

ZIP 61084 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.