ZIP code 61350: Ottawa, IL
ZIP code 61350 is in Ottawa (78% of residents), Dayton (2.2%) and Naplate (1.7%), in LaSalle County, Illinois. 18% of its residents live outside city limits. It is in Illinois's 14th congressional district (98%) and Illinois's 16th congressional district (1.8%). Its state senate districts are State Senate District 38 (96%) and State Senate District 37 (3.5%); its state house districts are State House District 76 (96%) and State House District 74 (3.5%).
See it on the mapAll of Illinois
City and county
| City or town | Share of ZIP residents |
|---|---|
| Ottawa | 78% |
| Dayton | 2.2% |
| Naplate | 1.7% |
| Wedron | 0.2% |
| County | Share of ZIP residents |
|---|---|
| LaSalle County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Ottawa township | 47% |
| South Ottawa township | 35% |
| Dayton township | 9.4% |
| Rutland township | 2.8% |
| Wallace township | 2.4% |
| Fall River township | 1.3% |
| Freedom township | 0.9% |
| Deer Park township | 0.6% |
| Serena township | 0.4% |
| Farm Ridge township | 0.3% |
| Utica township | 0.1% |
| Waltham township | 0.1% |
| Ophir township | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Illinois's 14th congressional district (IL-14) | 98% |
| Illinois's 16th congressional district (IL-16) | 1.8% |
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.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 38 | 96% |
| State Senate District 37 | 3.5% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 76 | 96% |
| State House District 74 | 3.5% |
Voting precincts
35 voting precincts overlap ZIP 61350. 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:61350")
ZIP 61350 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.