ZIP code 61104: Rockford, IL
ZIP code 61104 is in Rockford, in Winnebago County, Illinois. It is in Illinois's 17th congressional district. Its state senate district is State Senate District 34; its state house districts are State House District 68 (65%) and State House District 67 (35%).
See it on the mapAll of Illinois
City and county
| City or town | Share of ZIP residents |
|---|---|
| Rockford | 100% |
| County | Share of ZIP residents |
|---|---|
| Winnebago County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Rockford township | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Illinois's 17th congressional district (IL-17) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Thomas McNamara | 100% | |
| 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 34) | Steve Stadelman (Democratic) | 815-987-7557 | 100% |
| State Representative (State House District 68) | Dave Vella (Democratic) | 815-329-6741 | 65% |
| State Representative (State House District 67) | Maurice West (Democratic) | 815-987-7433 | 35% |
From Wikidata (community-maintained); confirm on the city's website.
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); Mayors: Wikidata (CC0).
Local government
- Rockford website: https://rockfordil.gov/
- Rockford laws: search for the Rockford, Illinois code of ordinances
- Winnebago County laws: search for the Winnebago County, Illinois code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 34 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 68 | 65% |
| State House District 67 | 35% |
Voting precincts
15 voting precincts overlap ZIP 61104. Map them, with each precinct's share of the ZIP's residents.
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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:61104")
ZIP 61104 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.