Portola Valley is an incorporated town in San Mateo County, California, United States. The population was 4,462 at the 2000 census. It was named for Spanish explorer Gaspar de Portola, who led the first party of Europeans to explore the San Francisco Peninsula, in 1769.
Portola Valley is one of the top forty wealthiest towns in the United States of America, with a median household income of $158,217 a year. Within the State of California, Portola Valley is ranked as the sixth wealthiest place. The zip code 94028, which encompasses the whole of Portola Valley, has the 37th most expensive housing prices within the country according to Forbes Magazine 2009.
Operatic tenor Richard Crooks (1900-1972), longtime host of The Voice of Firestone on network radio, lived in Portola Valley for many years until his death. In later years, he sang with the choir at the local Presbyterian church.
Jacques Littlefield (d.2009), President and Founder of the Military Vehicle Technology Foundation, one of the largest and most significant collections of historical military vehicles in the world.
Portola Valley is located at , on the eastern slope of the Peninsula Coastal Range of the Santa Cruz Mountains. The Windy Hill Open Space Preserve is on the town's southwest side and the Jasper Ridge Biological Preserve is on the north side of town. It is off Interstate 280, near Woodside, just west of Palo Alto and Los Altos and south of Menlo Park, and is in a mostly wooded area, with some open plains.(37.375023, -122.218635)