No. 50 Richest Zip Code: 94507, Alamo, Calif.

No. households:* 5,462
Pct. change in no. households since 2000:* 4.38
Average household income:* $207,916
Average household net worth:* $1,412,271

A quiet suburb of the San Francisco area, 19 miles east of Oakland, Alamo is a wealthy enclave of large lots with great views of 3,864-foot-tall Mount Diablo. In the San Ramon Valley, this Zip Code is dominated by elite couples and singles.

* Data source on all slides: Gadberry Group. Figures are for 2011.

Photography by: Getty Images
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