Median annual household income
With 1.1 million residents, Fairfax is Virginia’s most populous county. The federal government fuels the economy—Fairfax is home to the CIA and National Counterterrorism Center and companies with strong government ties like Freddie Mac. More From Forbes
: America’s Most Affluent Neighborhoods The World’s Richest Countries The World’s Billionaires The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.