ZIP code 91709: Chino Hills, CA
ZIP code 91709 is in Chino Hills, in San Bernardino County (100%) and Los Angeles County (0.1%), California. It is in California's 35th congressional district (100%) and California's 31st congressional district (0.1%). Its state senate districts are State Senate District 32 (100%) and State Senate District 22 (0.1%); its state house districts are Assembly District 59 (100%) and Assembly District 53 (0.1%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Chino Hills | 100% |
| Pomona | 0.1% |
| County | Share of ZIP residents |
|---|---|
| San Bernardino County | 100% |
| Los Angeles County | 0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Ontario CCD | 100% |
| East San Gabriel Valley CCD | 0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| California's 35th congressional district (CA-35) | 100% |
| California's 31st congressional district (CA-31) | 0.1% |
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 |
|---|---|---|---|
| U.S. Representative (CA-35) | Norma J. Torres (D) | 202-225-6161 | 100% |
| U.S. Representative (CA-31) | Gilbert Ray Cisneros, Jr. (D) | 202-225-5256 | 0.1% |
| 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 32) | Kelly Seyarto (R) | 951-280-1260 | 100% |
| State Senator (State Senate District 22) | Susan Rubio (Democratic) | 909-460-6064 | 0.1% |
| Assembly Member (Assembly District 59) | Phillip Chen (R) | 714-529-5502 | 100% |
| Assembly Member (Assembly District 53) | Michelle Rodriguez (Democratic) | 909-902-9606 | 0.1% |
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
- Chino Hills website: http://www.chinohills.org
- Chino Hills laws: search for the Chino Hills, 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
- Los Angeles County website: https://lacounty.gov
- Los Angeles County laws: search for the Los Angeles County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 32 | 100% |
| State Senate District 22 | 0.1% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 59 | 100% |
| Assembly District 53 | 0.1% |
Voting precincts
42 voting precincts overlap ZIP 91709. 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:91709")
ZIP 91709 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.