🇺🇸 United States ZIP Code

STANDARD

94505

Discovery Bay

ZIP Code 94505 is a standard zip code serving Discovery Bay, Discovery Bay, California (CA), in Contra Costa County, United States. It has an estimated population of 13,403 with a median household income of $111,290. 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: Discovery Bay
Timezone: America/Los_Angeles

Coordinates

Latitude: 37.898900
Longitude: -121.605400

Geographic Details

Land Area: 16.27 mi²
Water Area: 5.32 mi²
Population Density: 824.0 people per mi² (75th percentile)
Bounding Box: 37.932995°N, 37.799106°S, -121.534102°E, -121.632218°W

With 13,403 residents spread across 16.27 square miles, this area has a population density of 824.0 people per square mile.

Demographics

13,403

Population

70th percentile

$111,290

Median Income

95th percentile

$374,900

Median Home Value

90th percentile

16.27 mi²

Land Area

The median household income in 94505 is $111,290, and the median home value is $374,900. This places the area in the top 25% nationally for household income.

Housing

5,452

Total Units

4,733

Occupied Units

86.8%

Occupancy Rate

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

94517

Clayton

$116,677

92620

Irvine

$103,385

94131

San Francisco

$96,889

94588

Pleasanton

$119,849

92651

Laguna Beach

$95,865

95135

San Jose

$124,288

92673

San Clemente

$120,219

95037

Morgan Hill

$95,047

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.