🇺🇸 United States ZIP Code

STANDARD

94521

Concord

ZIP Code 94521 is a standard zip code serving Concord, Concord, California (CA), in Contra Costa County, United States. It has an estimated population of 41,249 with a median household income of $81,144. 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: Concord
Timezone: America/Los_Angeles

Coordinates

Latitude: 37.957500
Longitude: -121.975000

Geographic Details

Land Area: 12.96 mi²
Population Density: 3182.0 people per mi² (90th percentile)
Bounding Box: 37.983372°N, 37.914723°S, -121.883312°E, -122.009362°W

With 41,249 residents spread across 12.96 square miles, this area has a population density of 3182.0 people per square mile.

Demographics

41,249

Population

95th percentile

$81,144

Median Income

90th percentile

$390,000

Median Home Value

90th percentile

12.96 mi²

Land Area

The median household income in 94521 is $81,144, and the median home value is $390,000. This places the area in the top 25% nationally for household income.

Housing

16,269

Total Units

15,574

Occupied Units

95.7%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Concord, CA.

94518

Concord

94519

Concord

94520

Concord

94522

Concord

94524

Concord

94527

Concord

94529

Concord

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

95835

Sacramento

$79,528

92653

Laguna Hills

$91,878

94599

Yountville

$70,250

92629

Dana Point

$85,530

95368

Salida

$70,875

91364

Woodland Hills

$91,100

91935

Jamul

$86,406

93720

Fresno

$75,200

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.