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Zip Code 94303 — Palo Alto, CA

ZIP Code 94303 is associated with Palo Alto, CA, in Santa Clara County. The listed population estimate is 46,879; estimated density is 2,144.8 people per square mile. Among records with population estimates, it ranks #18 of 58 in Santa Clara County and #266 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.450640, -122.119280)

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

How 94303 Compares

MetricZIP 94303Santa Clara County recordsCA records
Population estimate46,8791,926,381 (sum)39,286,245 (sum)
Population Density2,144.8 /sq mi----
County population rank#18 of 58----
State population rank#266 of 1,762----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CA

ZIP CodeCityDistancePopulation estimate
ZIP 94301Palo Alto1.7 mi17,508
ZIP 94306Palo Alto2.5 mi27,183
ZIP 94025Menlo Park3.5 mi40,721
ZIP 94305Stanford3.7 mi18,509
ZIP 94043Mountain View3.8 mi33,176

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 →