🇺🇸 United States ZIP Code

PO BOX

94511

Bethel Island

ZIP Code 94511 is a po box zip code serving Bethel Island, Bethel Island, California (CA), in Contra Costa County, United States. It has an estimated population of 2,137 with a median household income of $35,288. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: Contra Costa
City: Bethel Island
Timezone: America/Los_Angeles

Coordinates

Latitude: 38.026600
Longitude: -121.642500

Geographic Details

Land Area: 5.56 mi²
Population Density: 384.0 people per mi² (70th percentile)
Bounding Box: 38.048130°N, 38.009396°S, -121.607792°E, -121.676060°W

With 2,137 residents spread across 5.56 square miles, this area has a population density of 384.0 people per square mile.

Demographics

2,137

Population

40th percentile

$35,288

Median Income

15th percentile

$206,100

Median Home Value

75th percentile

5.56 mi²

Land Area

The median household income in 94511 is $35,288, and the median home value is $206,100. This is below the national average for household income.

Housing

1,327

Total Units

1,026

Occupied Units

77.3%

Occupancy Rate

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

95947

Greenville

$31,687

93212

Corcoran

$33,756

92363

Needles

$30,077

93304

Bakersfield

$35,059

92545

Hemet

$38,770

95901

Marysville

$40,260

94801

Richmond

$40,030

94606

Oakland

$38,363

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.