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Zip Code 94303 — Palo Alto, CA

94303 is a ZIP Code associated with Palo Alto, CA, located within Santa Clara. 94303 ranks #18 out of 58 ZIP codes in Santa Clara County by population (and #266 out of 1,802 in CA). The area supports an estimated population of 46,879 residents across Data Pending housing units, with a population density of 2,144.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.450640, -122.119280)

Data MetricLocal Statistic
Postal / Zip Code94303
Primary CityPalo Alto
State / ProvinceCA
CountySanta Clara
Total Population46,879
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2,144.8 people/sq mi
TimezoneAmerica/Los_Angeles

How 94303 Compares

MetricZIP 94303Santa Clara CountyCA State Average
Population46,8791,926,381 (Total)39,286,245 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density2,144.8 /sq mi----
County Pop Rank#18 of 58----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94301Palo Alto1.7 mi17,508N/A
Zip 94306Palo Alto2.5 mi27,183N/A
Zip 94025Menlo Park3.5 mi40,721N/A
Zip 94305Stanford3.7 mi18,509N/A
Zip 94043Mountain View3.8 mi33,176N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →