Portola Valley, California Zip Codes
📍 Portola Valley is in San Mateo County, California with 1 zip code; the most populous is 94028.
Portola Valley is a USPS city name in San Mateo County, California with a Census population of approximately 6,888 across its ZIP codes. San Mateo County as a whole has 57 ZIP codes in this directory. Below you'll find every zip code serving Portola Valley with population, income and home value, a map, and the city's affordability profile.
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).
All Portola Valley Zip Codes
Portola Valley at a Glance
Portola Valley has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 6,888 residents, the largest being 94028 with 6,888 people.
The median ZIP in Portola Valley has a household income of $243,516 and a home value of more than $2,000,000, a price-to-income ratio of at least 8.2, above the 6.7 California ZIP median. Median rent across these ZIPs is $3,501 a month.
83% of households in the typical Portola Valley ZIP own their home (statewide ZIP median 64%). 78% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 3.1%, far below the 10.8% statewide ZIP median. Overall density is about 398 residents per square mile across 17 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Portola Valley Zip Code Map
Interactive map of Portola Valley, California zip codes. Click any marker for details.