ZIP code 91784: Upland, CA
ZIP code 91784 is in Upland (87% of residents) and San Antonio Heights (13%), in San Bernardino County, California. It is in California's 28th congressional district. Its state senate districts are State Senate District 29 (54%) and State Senate District 25 (46%); its state house district is Assembly District 41.
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Upland | 87% |
| San Antonio Heights | 13% |
| County | Share of ZIP residents |
|---|---|
| San Bernardino County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Ontario CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| California's 28th congressional district (CA-28) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-28) | Judy Chu (D) | 202-225-5464 | 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 29) | Eloise Reyes (Democratic) | 909-888-5360 | 54% |
| State Senator (State Senate District 25) | Sasha Pérez (Democratic) | 818-409-0402 | 46% |
| Assembly Member (Assembly District 41) | John Harabedian (Democratic) | 626-351-1917 | 100% |
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
- Upland website: http://www.ci.upland.ca.us
- Upland laws: search for the Upland, California code of ordinances
- San Antonio Heights laws: search for the San Antonio Heights, 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 ZIP residents |
|---|---|
| State Senate District 29 | 54% |
| State Senate District 25 | 46% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 41 | 100% |
Voting precincts
20 voting precincts overlap ZIP 91784. 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:91784")
ZIP 91784 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.