🇺🇸 United States ZIP Code

STANDARD

94303

Palo Alto

ZIP Code 94303 is a standard zip code serving Palo Alto, Palo Alto, California (CA), in San Mateo County, United States. It has an estimated population of 45,467 with a median household income of $80,127. 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 Mateo
City: Palo Alto
Timezone: America/Los_Angeles

Coordinates

Latitude: 37.467300
Longitude: -122.138800

Geographic Details

Land Area: 7.96 mi²
Water Area: 0.73 mi²
Population Density: 5710.0 people per mi² (95th percentile)
Bounding Box: 37.484191°N, 37.415520°S, -122.085199°E, -122.156522°W

With 45,467 residents spread across 7.96 square miles, this area has a population density of 5710.0 people per square mile.

Demographics

45,467

Population

95th percentile

$80,127

Median Income

90th percentile

$958,800

Median Home Value

95th percentile

7.96 mi²

Land Area

The median household income in 94303 is $80,127, and the median home value is $958,800. This places the area in the top 25% nationally for household income.

Housing

14,551

Total Units

13,238

Occupied Units

91.0%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Palo Alto, CA.

94301

Palo Alto

94302

Palo Alto

94304

Palo Alto

94306

Palo Alto

94309

Palo Alto

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

94089

Sunnyvale

$85,769

92672

San Clemente

$75,681

92584

Menifee

$75,147

92352

Lake Arrowhead

$69,296

91024

Sierra Madre

$88,837

94930

Fairfax

$89,306

91008

Duarte

$85,556

92869

Orange

$91,755

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.