ZIP code · El Cajon · California · United States
ZIP code 92021 — El Cajon
ZIP code 92021 serves El Cajon, California.
- Postal code
- 92021Single source Value from one source, not cross-checked.
- City
- El Cajon
- County
- San Diego FIPS 06073
- State
- California
- Country
- United States
- Coordinates
- 32.8178, -116.9223 — precision precise (locality)
View on OpenStreetMap - Population
- 69,306 (ZCTA, ACS 5-year)
- Population density
- 2,472 / sq mi
- Land area
- 28 sq mi (72.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $69,979
- Per-capita income
- $33,636
- Median age
- 36
- Households
- 22,573
- Housing units
- 23,360
- Median home value
- $572,000
- Median gross rent
- $1,818 / month
- Congressional districts
- CA-48 (also CA-51) (119th Congress)
- USDA hardiness zone
- 10a (30 to 35 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
Tools: compare 92021 with another ZIP · ZIPs within 25 miles · distance from 92021
Map of ZIP code 92021
Climate — monthly normals
Warmest month Aug (avg high 89°F), coldest Dec (avg low 42°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 69 | 69 | 71 | 75 | 76 | 81 | 86 | 89 | 87 | 81 | 75 | 69 |
| Avg low °F | 43 | 44 | 48 | 51 | 56 | 59 | 63 | 65 | 62 | 56 | 47 | 42 |
| Precip in | 2.3 | 2.6 | 1.9 | 0.8 | 0.3 | 0.1 | 0.2 | 0.0 | 0.1 | 0.5 | 1.0 | 1.8 |
NOAA 1991–2020 climate normals from the nearest station: EL CAJON (1.2 mi) · NOAA NCEI
Places in ZIP 92021
- 14 schools
- 4 hospitals & clinics
- 6 doctors & dentists
- 2 pharmacies
- 11 supermarkets
- 74 restaurants & cafés
- 8 bars & pubs
- 9 parks
- 6 playgrounds
- 4 gyms & sports centres
- 1 libraries
- 3 post offices
- 22 places of worship
- 7 banks
- 23 gas stations
- 3 EV charging stations
- 7 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page