🇺🇸 United States ZIP Code

PO BOX

92391

Twin Peaks

ZIP Code 92391 is a po box zip code serving Twin Peaks, Twin Peaks, California (CA), in San Bernardino County, United States. It has an estimated population of 2,534 with a median household income of $41,042. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: San Bernardino
City: Twin Peaks
Timezone: America/Los_Angeles

Coordinates

Latitude: 34.237900
Longitude: -117.234800

Geographic Details

Land Area: 2.33 mi²
Population Density: 1085.0 people per mi² (75th percentile)
Bounding Box: 34.254024°N, 34.224287°S, -117.215665°E, -117.251478°W

With 2,534 residents spread across 2.33 square miles, this area has a population density of 1085.0 people per square mile.

Demographics

2,534

Population

45th percentile

$41,042

Median Income

30th percentile

$211,900

Median Home Value

75th percentile

2.33 mi²

Land Area

The median household income in 92391 is $41,042, and the median home value is $211,900.

Housing

1,674

Total Units

910

Occupied Units

54.4%

Occupancy Rate

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

96007

Anderson

$38,258

93458

Santa Maria

$44,209

95437

Fort Bragg

$41,496

92544

Hemet

$43,726

92701

Santa Ana

$41,331

95811

Sacramento

$36,421

95380

Turlock

$40,564

95415

Boonville

$35,871

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.