ZIP code 92021: El Cajon, CA
ZIP code 92021 is in El Cajon (44% of residents), Bostonia (24%), Winter Gardens (9.7%), Lakeside (5.1%), Crest (3.5%), Harbison Canyon (2.6%) and Granite Hills (1.2%), in San Diego County, California. 10% of its residents live outside city limits. It is in California's 51st congressional district. Its state senate districts are State Senate District 39 (74%) and State Senate District 40 (26%); its state house districts are Assembly District 75 (56%), Assembly District 78 (27%) and Assembly District 79 (17%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| El Cajon | 44% |
| Bostonia | 24% |
| Winter Gardens | 9.7% |
| Lakeside | 5.1% |
| Crest | 3.5% |
| Harbison Canyon | 2.6% |
| Granite Hills | 1.2% |
| 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 |
|---|---|---|---|
| Mayor | Bill Wells | 619-441-1788 | 44% |
| 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 | 74% |
| State Senator (State Senate District 40) | Brian Jones (R) | 760-796-4655 | 26% |
| Assembly Member (Assembly District 75) | Carl DeMaio (R) | 858-566-7538 | 56% |
| Assembly Member (Assembly District 78) | Chris Ward (Democratic) | 619-280-7801 | 27% |
| Assembly Member (Assembly District 79) | LaShae Sharp-Collins (Democratic) | 619-465-7903 | 17% |
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: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- El Cajon laws: search for the El Cajon, California code of ordinances
- Bostonia laws: search for the Bostonia, California code of ordinances
- Winter Gardens laws: search for the Winter Gardens, 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 | 74% |
| State Senate District 40 | 26% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 75 | 56% |
| Assembly District 78 | 27% |
| Assembly District 79 | 17% |
Voting precincts
44 voting precincts overlap ZIP 92021. 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:92021")
ZIP 92021 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.