No. households: 5,505*

Pct. change in no. households since 2000: 13.76*

Average household income: $370,136

Average household net worth: $1,486,123

The town of Palm Beach—in America’s richest Zip Code, 33480—is a 16-mile barrier island with the Atlantic Ocean on its eastern boundary and Lake Worth on the west. High-end shopping and dining establishments can be found on Worth Avenue, and the island provides polo, golf, tennis, yachting, and deep-sea fishing, according to Sotheby’s International Realty. The predominant group is executives and professionals in their 40s and 50s with no children. The median age, according to 2010 census data, was 67.5.

*As Gadberry Group’s estimates for Palm Beach include some part-year residents, figures differ from U.S. Census Bureau counts, which show a decrease in population from 2000 to 2010.