No. 5 Richest Zip Code: 94028, Portola Valley, Calif.
No. households: 2,579 Pct. change in no. households since 2000: 3.28 Average household income: $270,922 Average household net worth: $1,531,291
This Portola Valley Zip code is adjacent to the No. 9 richest Zip Code, 94022, and the No. 32 richest, 94304. The town of Portola Valley is just west of Stanford University in a valley by the San Andreas Fault. It offers a trail system, scenic roads, open space, and natural views, according to the town. Elite couples and singles are the predominant inhabitants.