Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CA/PALO-ALTO

Palo Alto ZIP codes, California

Palo Alto, CA has 6 ZIP codes (94303, 94306, 94301, 94304, 94302 and 94309) and area code 650. The largest is 94303.

USPS city name
6 ZIP codes
Overlapping the city
5 more
Population
67,237
Area code
650

Mail addressed to Palo Alto uses the ZIP codes above. 5 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Palo Alto in numbers

About 67,237 people live in Palo Alto, in 26,021 households. The median household income is $231,101 a year, 2.3 times the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $2,000,000+, and median gross rent is $3,484 a month. The median age is 43.6; 82.3% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 21 minutes.

Population67,237Palo Alto67,237
Households26,021Palo Alto26,021
Median age43.6Palo Alto43.6California37.9US 38.9
Median household income$231,101Palo Alto$231,101California$99,122US $80,734
Median home value$2,000,000+Palo Alto$2,000,000+California$734,700US $332,700
Median gross rent$3,484Palo Alto$3,484California$2,036US $1,413
Bachelor's degree or higher82.3%Palo Alto82.3%California37.1%US 35.7%
Mean commute21.4 minPalo Alto21.4 minCalifornia28.7 minUS 26.4 min
Population density2,796 / sq miPalo Alto2,796 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Palo Alto city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Palo Alto

ZIP codes with the USPS city name Palo Alto
ZIP City Type Population Median income Median home
94303 Palo Alto , CA Standard 46,879 $151,609 $1,826,200
94306 Palo Alto , CA Standard 27,183 $210,000 $2,000,000+
94301 Palo Alto , CA Standard 17,508 $242,006 $2,000,000+
94304 Palo Alto , CA Standard 5,000 $154,141 $2,000,000+
94302 Palo Alto , CA No street area — — —
94309 Palo Alto , CA No street area — — —

Other ZIP codes overlapping Palo Alto

These ZIP codes cover part of Palo Alto but are addressed as somewhere else.

ZIP codes overlapping Palo Alto
ZIP City Type Population Median income Median home
94022 Los Altos , CA Standard 20,027 $250,000+ $2,000,000+
94028 Portola Valley , CA Standard 6,531 $250,000+ $2,000,000+
94043 Mountain View , CA Standard 33,176 $203,298 $1,641,100
94305 Stanford , CA Standard 18,509 $83,088 $2,000,000+
95033 Los Gatos , CA Standard 9,600 $189,118 $1,417,200

Map of Palo Alto ZIP codes

The ZIP codes of Palo Alto, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Palo Alto

The nearest larger towns are Mountain View (83,732 people, 3.5 mi), Sunnyvale (154,236 people, 6.5 mi) and Redwood City (82,447 people, 9.1 mi).

Towns near Palo Alto
TownPopulationDistance
Los Altos Hills 8,377 2.1 mi
Stanford 18,662 2.5 mi
Los Altos 30,698 3.2 mi
Mountain View 83,732 3.5 mi
Loyola 3,430 4.0 mi
West Menlo Park 3,634 4.2 mi
East Palo Alto 29,069 5.0 mi
Atherton 6,993 5.3 mi
Portola Valley 4,305 5.4 mi
Menlo Park 32,727 5.8 mi
North Fair Oaks 13,100 6.4 mi
Sunnyvale 154,236 6.5 mi
Woodside 5,126 6.6 mi
Cupertino 58,566 7.6 mi

More nearby: every ZIP code in Santa Clara County · California ZIP codes

Cite this page

zipcodes.pro. “Palo Alto, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/palo-alto

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