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🇺🇸 United States ZIP Code

STANDARD

92021

El Cajon

ZIP Code 92021 is a standard zip code serving El Cajon, El Cajon, California (CA), in San Diego County, United States. It has an estimated population of 65,068 with a median household income of $49,521. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

$0 National: $37,585 $150K+ $49,521

Location

State / Province
California (CA)
County
San Diego
City
El Cajon
Timezone
America/Los_Angeles

Coordinates

Latitude
32.817800
Longitude
-116.922300

Geographic Details

Land Area
29.83 mi²
Water Area
0.22 mi²
Population Density
2181.0 people per mi² (85th percentile)
Bounding Box
32.888119°N, 32.782354°S, -116.792984°E, -116.962440°W

With 65,068 residents spread across 29.83 square miles, this area has a population density of 2181.0 people per square mile.

Demographics

65,068

Population

95th percentile

$49,521

Median Income

50th percentile

$299,000

Median Home Value

85th percentile

29.83 mi²

Land Area

The median household income in 92021 is $49,521, and the median home value is $299,000.

Housing

23,881

Total Units

22,649

Occupied Units

94.8%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in El Cajon, CA.

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

Frequently Asked Questions

What information is available for each ZIP code?
Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).
What are the different types of ZIP codes?
There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.
How often is ZIP code data updated?
ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.
What is population density and why does it matter?
Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.
How are ZIP code boundaries determined?
ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.
What does median household income tell me about a ZIP code?
Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.