ZIP code 61107: Rockford, IL
ZIP code 61107 is in Rockford (85% of residents), in Winnebago County (98%) and Boone County (1.5%), Illinois. 15% of its residents live outside city limits. It is in Illinois's 17th congressional district (70%) and Illinois's 16th congressional district (30%). Its state senate districts are State Senate District 34 (80%) and State Senate District 35 (20%); its state house districts are State House District 68 (69%), State House District 69 (20%) and State House District 67 (11%).
See it on the mapAll of Illinois
City and county
| City or town | Share of ZIP residents |
|---|---|
| Rockford | 85% |
| County | Share of ZIP residents |
|---|---|
| Winnebago County | 98% |
| Boone County | 1.5% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Rockford township | 98% |
| Belvidere township | 1.5% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Illinois's 17th congressional district (IL-17) | 70% |
| Illinois's 16th congressional district (IL-16) | 30% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Thomas McNamara | 85% | |
| U.S. Representative (IL-17) | Eric Sorensen (D) | 202-225-5905 | 70% |
| U.S. Representative (IL-16) | Darin LaHood (R) | 202-225-6201 | 30% |
| 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 | 80% |
| State Senator (State Senate District 35) | Dave Syverson (R) | 815-987-7555 | 20% |
| State Representative (State House District 68) | Dave Vella (Democratic) | 815-329-6741 | 69% |
| State Representative (State House District 69) | Joe Sosnowski (R) | 815-547-3436 | 20% |
| State Representative (State House District 67) | Maurice West (Democratic) | 815-987-7433 | 11% |
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
- Boone County website: http://www.boonecountyil.org
- Boone County laws: search for the Boone County, Illinois code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 34 | 80% |
| State Senate District 35 | 20% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 68 | 69% |
| State House District 69 | 20% |
| State House District 67 | 11% |
Voting precincts
27 voting precincts overlap ZIP 61107. 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:61107")
ZIP 61107 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.