ZIP Code 94303 — Palo Alto, California
📍 ZIP code 94303 is in Palo Alto, Santa Clara County, California.
ZIP code 94303 is located in Palo Alto, Santa Clara County, California. It is a standard zip code in the Pacific Time Zone with an estimated population of 47,989. The area code for zip code 94303 is 650.
ZIP Code 94303 Demographics
Population
Income & Economy
Housing
Education
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
Affordability & Profile: ZIP 94303 in Context
The median home in 94303 is valued at $1,670,900 against a median household income of $144,259, a price-to-income ratio of 11.6. That is far above the 6.7 median across the 1,558 California ZIP codes with published housing data, and well past the 3.0 ratio that marks an attainable market nationally, which means a household earning the local median income cannot finance the local median home on conventional terms. Within Santa Clara County, 94303 ranks 52 of 56 ZIPs on affordability (1 = lowest ratio); the county median ratio is 8.6. Renting takes 20.4% of median household income (median rent $2,458 a month), under the 30% cost-burden threshold.
94303 ranks 176 of 1,558 statewide on median household income and 84 of 1,558 on median home value; its income is below the $159,101 Santa Clara County median. 57% of households own their home, below the 64% statewide ZIP median, making this a majority-owner ZIP. 48% of adults hold a bachelor's degree or higher, far above the 31% median, and the poverty rate is 8.3%, below the 10.8% statewide ZIP median. Unemployment stands at 5.1%.
With 5,713 residents per square mile across 8.4 square miles of land, 94303 is far denser than the statewide ZIP median of 1,120 (rank 386 of 1,558). This is predominantly single-family residential with suburban street patterns.
Ratios and ranks are computed from the ACS figures above across the 1,558 California ZIP codes with published housing data. See the 2026 California affordability report for the statewide analysis and the methodology for definitions.
Nearby Zip Codes
Cities & Places Served
ZIP code 94303 primarily serves Palo Alto in Santa Clara County, California.














