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9. Morris County, N.J.

Average income: $128,371

Morris County, located about 25 miles from New York City, is another county within easy commuting distance to Manhattan. It includes Harding Township once named one of the richest zip codes in the U.S. by Forbes.

Morris County has numerous Revolutionary war-era historic sites, such as Washington’s Headquarters and Jockey Hollow, where the Continental army endured the brutal winter of 1779-80. The county’s unemployment rate for 2011 was 7.3, nearly 3 points lower than the state average of 10 percent according to the N.J. Department of Labor and Workforce Development.

Steven Reynolds | Flickr