ZIP code 91941: La Mesa, CA
ZIP code 91941 is in La Mesa (60% of residents), Casa de Oro-Mount Helix (29%), Rancho San Diego (5.7%) and Spring Valley (5.4%), in San Diego County, California. It is in California's 51st congressional district. Its state senate district is State Senate District 39; its state house districts are Assembly District 79 (65%) and Assembly District 75 (35%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| La Mesa | 60% |
| Casa de Oro-Mount Helix | 29% |
| Rancho San Diego | 5.7% |
| Spring Valley | 5.4% |
| El Cajon | <0.1% |
| County | Share of ZIP residents |
|---|---|
| San Diego County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| San Diego CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| California's 51st congressional district (CA-51) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-51) | Sara Jacobs (D) | 202-225-2040 | 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 39) | Akilah Weber Pierson (Democratic) | 619-688-6700 | 100% |
| Assembly Member (Assembly District 79) | LaShae Sharp-Collins (Democratic) | 619-465-7903 | 65% |
| Assembly Member (Assembly District 75) | Carl DeMaio (R) | 858-566-7538 | 35% |
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
- La Mesa website: http://www.cityoflamesa.com
- La Mesa laws: search for the La Mesa, California code of ordinances
- Casa de Oro-Mount Helix laws: search for the Casa de Oro-Mount Helix, California code of ordinances
- Rancho San Diego laws: search for the Rancho San Diego, 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 39 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 79 | 65% |
| Assembly District 75 | 35% |
Voting precincts
23 voting precincts overlap ZIP 91941. 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:91941")
ZIP 91941 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.