The Richest County in Each State

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11. Honolulu County, Hawaii
> County median household income: $72,764
> State median household income: $67,402
> Pct. households in county making $200,000 or more: 6.6%
> 2013 county unemployment rate: 4.3%

Hawaii had one of the highest annual median household incomes in the nation over the five years through 2013, at $67,402, which likely helped residents afford the state’s exceptionally high cost of living. Honolulu County was the state’s wealthiest. A typical household in the county earned $72,764 a year during that time. As for the state as a whole, residents also benefitted from a strong health care system. Less than 6% of Honolulu County residents did not have health insurance over the five years through 2013, less than half the comparable national figure of 14.9%.

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12. Blaine County, Idaho
> County median household income: $64,042
> State median household income: $46,767
> Pct. households in county making $200,000 or more: 5.5%
> 2013 county unemployment rate: 5.6%

Residents in the vast majority of the wealthiest counties were far more likely to have health insurance than most Americans. However, more than 18% of Blaine County residents did not have health insurance over the five years through 2013, one of the worst rates nationwide. County residents were still far better off than others in the state, as well as most Americans, however. Only 8.3% lived in poverty over that period, for example, much less than the comparable national figure of 15.4%.

13. Kendall County, Illinois
> County median household income: $81,765
> State median household income: $56,797
> Pct. households in county making $200,000 or more: 5.0%
> 2013 county unemployment rate: 8.3%

Kendall County had an annual median household income of nearly $82,000 over the five years through 2013. Many Kendall County residents likely found higher-paying jobs in nearby Chicago, where numerous businesses and institutions are located. While higher incomes are often the result of good job opportunities, 8.3% of the county’s workforce was unemployed in 2013. The county was one of only three wealthiest counties reviewed where the unemployment rate exceeded the national rate of 7.4% that year.

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14. Hamilton County, Indiana
> County median household income: $82,468
> State median household income: $48,248
> Pct. households in county making $200,000 or more: 10.0%
> 2013 county unemployment rate: 5.3%

More than 55% of Hamilton County adults had at least a bachelor’s degree over the five year period through 2013, and 96.3% had a high school diploma or higher, both among the highest rates nationwide. High educational attainment rates likely helped residents earn the highest incomes in the state. Hamilton households had an annual median income of $82,468 during those years, more than double the comparable income in Fayette, the state’s poorest county.

15. Dallas County, Iowa
> County median household income: $73,847
> State median household income: $51,843
> Pct. households in county making $200,000 or more: 7.4%
> 2013 county unemployment rate: 3.7%

A typical household in Iowa’s richest county, Dallas, earned $73,847 a year over the five years through 2013, more than $22,000 higher than the comparable figure for the state. This was not an especially large income gap compared to other states. As in most wealthy areas, Dallas residents were well educated. Nearly 44% had at least a bachelor’s degree on average over the five years through 2013, and more than 94% had a high school diploma or higher, both among the higher rates in the country. With an unemployment rate of less than 4% residents also had access to a relatively strong job market.