🇺🇸 United States ZIP Code

STANDARD

91731

El Monte

ZIP Code 91731 is a standard zip code serving El Monte, El Monte, California (CA), in Los Angeles County, United States. It has an estimated population of 29,591 with a median household income of $36,614. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: Los Angeles
City: El Monte
Timezone: America/Los_Angeles

Coordinates

Latitude: 34.079100
Longitude: -118.037100

Geographic Details

Land Area: 3.81 mi²
Water Area: 0.07 mi²
Population Density: 7758.0 people per mi² (95th percentile)
Bounding Box: 34.097117°N, 34.062751°S, -118.018451°E, -118.072927°W

With 29,591 residents spread across 3.81 square miles, this area has a population density of 7758.0 people per square mile.

Demographics

29,591

Population

85th percentile

$36,614

Median Income

20th percentile

$348,400

Median Home Value

90th percentile

3.81 mi²

Land Area

The median household income in 91731 is $36,614, and the median home value is $348,400. This is below the national average for household income.

Housing

8,381

Total Units

8,007

Occupied Units

95.5%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in El Monte, CA.

91732

El Monte

91734

El Monte

91735

El Monte

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

90038

Los Angeles

$35,144

90304

Inglewood

$37,783

90262

Lynwood

$40,831

93249

Lost Hills

$32,768

90744

Wilmington

$41,920

92583

San Jacinto

$39,588

96122

Portola

$40,313

93905

Salinas

$41,607

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.