ZIP code 91901: Alpine, CA
ZIP code 91901 is in Alpine (82% of residents) and Harbison Canyon (2.3%), in San Diego County, California. 15% of its residents live outside city limits. It is in California's 51st congressional district (66%) and California's 52nd congressional district (34%). Its state senate districts are State Senate District 40 (98%) and State Senate District 18 (1.7%); its state house district is Assembly District 75.
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Alpine | 82% |
| Harbison Canyon | 2.3% |
| Descanso | 0.3% |
| County | Share of ZIP residents |
|---|---|
| San Diego County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Alpine CCD | 86% |
| Laguna-Pine Valley CCD | 6.8% |
| San Diego CCD | 3.7% |
| Jamul CCD | 3.0% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| California's 51st congressional district (CA-51) | 66% |
| California's 52nd congressional district (CA-52) | 34% |
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-51) | Sara Jacobs (D) | 202-225-2040 | 66% |
| U.S. Representative (CA-52) | Juan Vargas (D) | 202-225-8045 | 34% |
| 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 40) | Brian Jones (R) | 760-796-4655 | 98% |
| State Senator (State Senate District 18) | Steve Padilla (Democratic) | 760-398-6442 | 1.7% |
| Assembly Member (Assembly District 75) | Carl DeMaio (R) | 858-566-7538 | 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
- Alpine laws: search for the Alpine, California code of ordinances
- Harbison Canyon laws: search for the Harbison Canyon, California code of ordinances
- San Diego County laws: search for the San Diego County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 40 | 98% |
| State Senate District 18 | 1.7% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 75 | 100% |
Voting precincts
16 voting precincts overlap ZIP 91901. 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:91901")
ZIP 91901 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.