Los Alamos County in New Mexico was next, followed by Maryland’s Howard County and Virginia’s Fairfax County. Hunterdon County in New Jersey completed the top five, but Virginia’s Arlington and Stafford counties made it into the top 10.
The Census Bureau ranked the city of Falls Church, with a median income of $121,000, as the richest U.S. county. But that’s because the bureau ranks Virginia’s independent cities with the nation’s counties.
Montgomery County and Prince William County did not miss the top 10 by much, and the top 30 included Charles, Calvert, Anne Arundel and St. Mary’s counties in Maryland, and the city of Fairfax in Virginia.
The Washington area has reigned over the list of most affluent counties for years, in large part because it has so many residents with college degrees and professional jobs. That gives the region a disproportionately large share of households in which two adults have well-paying jobs.
Here’s the Census Bureau list of counties with the highest median incomes:
Falls Church City, Va., $121,250
Loudoun County, Va., $118,934
Los Alamos County, N.M., $112,115
Howard County, Md., $108,234
Fairfax County, Va., $106,690
Hunterdon County, N.J., $103,301
Arlington County, Va., $99,255
Douglas County, Colo., $98,426
Stafford County, Va., $95,927
Somerset County, N.J., $95,574
Morris County, N.J., $95,236
Montgomery County, Md., $94,365
Prince William County, Va. $93,011
At the other end of the scale, the poorest county is Wilcox County, Ala., with a median household income of barely $22,000, the Census Bureau says. No county in Maryland or Virginia is among the bottom-ranked counties.