🇺🇸 United States ZIP Code

STANDARD

94534

Fairfield

ZIP Code 94534 is a standard zip code serving Fairfield, Fairfield, California (CA), in Solano County, United States. It has an estimated population of 36,416 with a median household income of $92,676. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: Solano
City: Fairfield
Timezone: America/Los_Angeles

Coordinates

Latitude: 38.242300
Longitude: -122.131400

Geographic Details

Land Area: 79.16 mi²
Water Area: 0.60 mi²
Population Density: 460.0 people per mi² (70th percentile)
Bounding Box: 38.323584°N, 38.100442°S, -122.025294°E, -122.216882°W

With 36,416 residents spread across 79.16 square miles, this area has a population density of 460.0 people per square mile.

Demographics

36,416

Population

90th percentile

$92,676

Median Income

90th percentile

$341,700

Median Home Value

90th percentile

79.16 mi²

Land Area

The median household income in 94534 is $92,676, and the median home value is $341,700. This places the area in the top 25% nationally for household income.

Housing

13,331

Total Units

12,643

Occupied Units

94.8%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Fairfield, CA.

94533

Fairfield

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

94019

Half Moon Bay

$100,394

95121

San Jose

$82,001

95035

Milpitas

$95,437

92606

Irvine

$86,500

94086

Sunnyvale

$96,919

93441

Los Olivos

$84,773

90746

Carson

$80,092

91775

San Gabriel

$81,613

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.