1. Loudoun County, VA (Median household income: $125,900 인구: 161,000)

2. Falls Church, VA (Median household income: $122,092 인구: 12,000)

3. Fairfax County, VA (Median household income: $112,844 인구: 1,131,900)

4. Howard County, MD (Median household income: $110,224 인구: 5,000)

5. Douglas County, CO (Median household income: $109,926 인구: 322,387)

6. Los Alamos County, NM (Median household income: $107,126 인구: 18,147)

7. Williamson County, TN (Median household income: $104,367 인구: 489,250)

8. Arlington County, VA (Median household income: $104,354 인구: 24,000)

9. Hunterdon County, NJ (Median household income: $102,797 인구: 125,488)

10. Santa Clara County, CA (Median household income: $102,191 인구: 1.890,000)

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