Portola Valley is a town located in San Mateo County on the San Francisco Peninsula in California, United States. Nestled in the foothills of the Santa Cruz Mountains, it is bordered by Woodside to the north, Los Trancos Woods and Ladera to the east, and the scenic open spaces of Windy Hill and the Midpeninsula Regional Open Space District to the west and south. As of the 2020 United States census, the town had a population of 4,456. Known for its rural charm, expansive open space, and strong environmental preservation efforts, Portola Valley is one of the wealthiest communities in the United States. The town is home to tech executives, academics, and professionals, many drawn by its serene setting and proximity to Silicon Valley. Portola Valley also boasts an exceptionally well-educated population, with over 80% of residents aged 25 and older holding a bachelor’s degree or higher. The area is served by top-rated schools and offers extensive trails and equestrian paths, maintaining a strong connection to its natural surroundings.