🇺🇸 United States ZIP Code

STANDARD

91377

Oak Park

ZIP Code 91377 is a standard zip code serving Oak Park, Oak Park, California (CA), in Ventura County, United States. It has an estimated population of 13,811 with a median household income of $128,218. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: Ventura
City: Oak Park
Timezone: America/Los_Angeles

Coordinates

Latitude: 34.185000
Longitude: -118.766900

Geographic Details

Land Area: 5.29 mi²
Population Density: 2609.0 people per mi² (85th percentile)
Bounding Box: 34.205918°N, 34.168005°S, -118.744934°E, -118.788749°W

With 13,811 residents spread across 5.29 square miles, this area has a population density of 2609.0 people per square mile.

Demographics

13,811

Population

75th percentile

$128,218

Median Income

95th percentile

$635,100

Median Home Value

95th percentile

5.29 mi²

Land Area

The median household income in 91377 is $128,218, and the median home value is $635,100. This places the area in the top 25% nationally for household income.

Housing

5,297

Total Units

5,158

Occupied Units

97.4%

Occupancy Rate

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

95746

Granite Bay

$127,736

92694

Ladera Ranch

$127,906

94065

Redwood City

$132,337

92679

Trabuco Canyon

$142,803

91708

Chino

$119,063

92610

Foothill Ranch

$124,471

90402

Santa Monica

$140,139

92067

Rancho Santa Fe

$125,051

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.