San Mateo – 94028 – Portola Valley – CA – 16/25
San Mateo – 94028 – Portola Valley – CA – 16/25
Cities: Portola Valley, CA (59.25%), Menlo Park, CA (0.02%)
Counties: San Mateo County, CA (92.83%), Santa Clara County, CA (7.17%)
Estimated zip code population in 2011: 6,740
Zip code population in 2010: 6,534
Zip code population in 2000: 6,595