ZIP code 61109: Rockford, IL
ZIP code 61109 is in Rockford (68% of residents) and New Milford (3.0%), in Winnebago County (100%) and Ogle County (<0.1%), Illinois. 29% of its residents live outside city limits. It is in Illinois's 17th congressional district (68%) and Illinois's 16th congressional district (32%). Its state senate districts are State Senate District 34 (98%) and State Senate District 45 (2.5%); its state house districts are State House District 67 (79%), State House District 68 (19%) and State House District 89 (2.5%).
See it on the mapAll of Illinois
City and county
| City or town | Share of ZIP residents |
|---|---|
| Rockford | 68% |
| New Milford | 3.0% |
| Cherry Valley | 0.8% |
| County | Share of ZIP residents |
|---|---|
| Winnebago County | 100% |
| Ogle County | <0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Cherry Valley township | 58% |
| Rockford township | 42% |
| Monroe township | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Illinois's 17th congressional district (IL-17) | 68% |
| Illinois's 16th congressional district (IL-16) | 32% |
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 | 68% | |
| U.S. Representative (IL-17) | Eric Sorensen (D) | 202-225-5905 | 68% |
| U.S. Representative (IL-16) | Darin LaHood (R) | 202-225-6201 | 32% |
| 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 | 98% |
| State Senator (State Senate District 45) | Andrew Chesney (R) | 815-232-0774 | 2.5% |
| State Representative (State House District 67) | Maurice West (Democratic) | 815-987-7433 | 79% |
| State Representative (State House District 68) | Dave Vella (Democratic) | 815-329-6741 | 19% |
| State Representative (State House District 89) | Tony McCombie (R) | 815-291-8989 | 2.5% |
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
- New Milford laws: search for the New Milford, Illinois code of ordinances
- Winnebago County laws: search for the Winnebago County, Illinois code of ordinances
- Ogle County website: http://www.oglecounty.org
- Ogle County laws: search for the Ogle County, Illinois code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 34 | 98% |
| State Senate District 45 | 2.5% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 67 | 79% |
| State House District 68 | 19% |
| State House District 89 | 2.5% |
Voting precincts
21 voting precincts overlap ZIP 61109. 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:61109")
ZIP 61109 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.