1.15 M
Population
1st in Virginia
1,051 km²
Area
Fairfax
County seat
$145,200
Median household income
Top 10 in the U.S.
Fairfax County
Fairfax County is the most populous jurisdiction in Virginia and one of the wealthiest counties in the United States, home to Tysons, the CIA headquarters in Langley and a dense cluster of defense and technology employers.