Ontario, California
Ontario is a city in San Bernardino County, California, with 175,265 residents in 2020. It is in California's 35th congressional district. It spans 2 state house districts. Its state senate district is State Senate District 22.
County
| County | Share of residents |
|---|---|
| San Bernardino County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| California's 35th congressional district (CA-35) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-35) | Norma J. Torres (D) | 202-225-6161 | 100% |
| U.S. Senator | Adam B. Schiff (D) | 202-224-3841 | statewide |
| U.S. Senator | Alex Padilla (D) | 202-224-3553 · contact form | statewide |
| State Senator (State Senate District 22) | Susan Rubio (Democratic) | 909-460-6064 | 100% |
| Assembly Member (Assembly District 53) | Michelle Rodriguez (Democratic) | 909-902-9606 | 87% |
| Assembly Member (Assembly District 50) | Robert Garcia (Democratic) | 909-966-5090 | 13% |
Elected in 2024 under CA's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
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
- Ontario website: https://ontarioca.gov
- Ontario laws: search for the Ontario, California code of ordinances
- San Bernardino County website: https://main.sbcounty.gov/
- San Bernardino County laws: search for the San Bernardino County, California code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 22 | 100% |
| State house district | Share of residents |
|---|---|
| Assembly District 53 | 87% |
| Assembly District 50 | 13% |
ZIP codes
Percentages mark ZIPs only partly in Ontario: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Ontario'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:0653896")
Ontario 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.