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8. Harris County, Ga. / Chambers County, Ala.

Wealth gap: 109.68%
Harris avg. annual income: $84,697
Chambers avg. annual income: $40,393

In a wealth gap that straddles state lines, the disparity between Harris County, Ga., and Chambers County, Ala., sees the average income of the Georgia side more than double that of the Alabama side, for a wealth gap of 109.68 percent. Harris County benefits from being near LaGrange and Columbus, Ga., which the Chamber of Commerce had dubbed “economic engines” for the county. The county benefits most from businesses and economic activity linked to tourism, agriculture and financial services, and currently offers tax credits for businesses that create more 25 or more jobs in the county through the Valley Partnership Joint Development Authority.

To the west, Chambers County has an average annual household income of $40,393, with a median income of only $31,467. According to the Census five-year estimates, Chambers has 18.9 percent of households listing no members currently employed, compared with 13.1 percent in Harris County. Chambers also reports that 38.6 percent of its households draw income from Social Security, while Harris County stands at 29.6 percent.

Photo: CNBC.com