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10 highest-income counties by median household income (2007) [1] Number of counties by state in following lists: Virginia 6, Maryland 5, New Jersey 3, New York 2, California 2, Colorado 1, Georgia 1. 10 of the 20 counties are part of the Washington Metropolitan Area and 5 counties are part of the New York Metropolitan Area. By Census region, 12 counties are located in the South, 5 in the Northeast, and 3 in the West. 16 out of the 20 counties are part of the densely populated Northeast Megalopolis. Counties with populations of 250,000 or more Rank County Median Household Income 1 Loudoun County, Virginia $107,207 2 Fairfax County, Virginia $105,241 3 Howard County, Maryland $101,672 4 Somerset County, New Jersey $97,658 5 Morris County, New Jersey $94,684 6 Douglas County, Colorado $92,824 7 Montgomery County, Maryland $91,835 8 Nassau County, New York $89,782 9 Prince William County, Virginia $87,243 10 Santa Clara County, California $84,360 |
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