28. Piedmont, California (Average Household Income: $295,742)

Piedmont, California got its name from the Piedmont region of Italy, which literally means foothill in Italian. This wealthy town is completely surrounded by the city of Oakland in the beautiful East Bay.

A short trip across the Bay Bridge is all that separates Piedmont from the excitement of San Francisco. It’s also close to the University of California: Berkeley, which is located just to the north of town.