Portola Valley ZIP Code List — San Mateo County, CA
There is one unique ZIP code in Portola Valley, California and it is 94028. Area code: 650.
1
ZIP codes
17.32
sq mi land
0.09
sq mi water
650
area code
Portola Valley, CA ZIP code map
About Portola Valley, CA
Portola Valley, California, is a quaint and picturesque community nestled in the heart of San Mateo County. Known for its serene environment and natural beauty, it offers a unique blend of suburban charm and access to the great outdoors. With its rich history and commitment to preserving open spaces, Portola Valley attracts residents who cherish tranquility and a close-knit community feel.
Location & geography
Portola Valley covers a land area of 17.32 square miles, complemented by a water area of 0.09 square miles. It is ideally situated near major highways, just a short drive from neighboring cities such as Menlo Park, approximately 5 miles to the northeast, and Palo Alto, about 6 miles east. The terrain is characterized by rolling hills and open space, providing stunning views of the San Francisco Peninsula.
Community & economy
The community of Portola Valley is known for its affluent neighborhoods and a strong emphasis on preserving the environment. Many residents engage in industries such as technology, education, and professional services, contributing to the area’s economy while enjoying a high quality of life. Daily life here is often marked by outdoor activities, social events, and community gatherings that foster a sense of belonging among its residents.
Transportation
Portola Valley is conveniently located near major roadways, with access to the Alpine Road and the California State Route 280, which connects to the greater Bay Area. The nearest airport is San Francisco International Airport, situated approximately 20 miles to the north, making travel accessible for both residents and visitors. Public transit options are limited, emphasizing the community's tranquil, suburban lifestyle.
History
Portola Valley was founded in the late 1950s and early 1960s, developing rapidly as a residential area while maintaining its natural landscapes. Key industries have historically included agriculture and, more recently, high-tech sectors, given its proximity to Silicon Valley. Notable events include the establishment of numerous parks and preserves, reflecting the community's dedication to conservation.
Did you know?
An interesting fact about Portola Valley is that it has a long-standing commitment to environmental sustainability, exemplified by its numerous preserved open spaces and parks. Additionally, it is one of the few towns in California that has no streetlights, contributing to its dark-sky initiative and preserving the night sky for stargazing.
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions
What is the ZIP code for Portola Valley, CA?
Portola Valley, CA has one ZIP code: 94028.
What is the main ZIP code for Portola Valley, CA?
The primary ZIP code for Portola Valley, CA is 94028. The city uses area code 650 for phone service.
What county is Portola Valley, CA in?
Portola Valley is located in San Mateo County, California.
How many ZIP codes are in Portola Valley, CA?
Portola Valley, CA has 1 ZIP code.
What is the ZIP code for Portola Valley's main residential area near the Portola Valley School District?
Portola Valley's primary residential areas, including those near Portola Valley School District, are located in ZIP code 94028, which covers the entire incorporated town.
What ZIP code should I use for mailing addresses in Portola Valley near Alpine Road and Whisperwood Road?
Any mailing address in Portola Valley, including properties along Alpine Road and Whisperwood Road, uses ZIP code 94028.
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