Ottawa, Illinois
Ottawa is a city in LaSalle County, Illinois, with 18,832 residents in 2020. It is in Illinois's 14th congressional district. Its state senate district is State Senate District 38; its state house district is State House District 76.
County
| County | Share of residents |
|---|---|
| LaSalle County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Illinois's 14th congressional district (IL-14) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-14) | Lauren Underwood (D) | 202-225-2976 | 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 38) | Sue Rezin (R) | 815-220-8720 | 100% |
| State Representative (State House District 76) | Murri Briel (Democratic) | 815-587-7912 | 100% |
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
- Ottawa website: https://cityofottawa.org/
- Ottawa laws: search for the Ottawa, Illinois code of ordinances
- LaSalle County website: https://lasallecountyil.gov/
- LaSalle County laws: search for the LaSalle County, Illinois code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 38 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 76 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Ottawa: the share of that ZIP's residents living in it.
- 61350 (78%)
Get this in your AI agent
Your agent can get Ottawa's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:1756926")
Ottawa here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.