Atherton is an incorporated town in San Mateo County,
California, United States. Its population was 7,194 at the 2000
census. In September 2010, Forbes magazine placed Atherton's zip
code of 94027 at #2 on their annual list of America's most
expensive zip codes, with a median home price of $4,010,200.
Atherton is one of the wealthiest cities in the United States.