Fairfax County, VA is 407 sq miles (1,054 km²).
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โ 11y agoWiki User
โ 14y agoFairfax County, Virginia, USA - 407 square miles.
Fulton County, GA's area is 534.75 square miles.
Baldwin County, AL's area is 2,027 square miles.
Marquette County, Michigan is 3,425 square miles.
Onondaga County, NY is 806 square miles.
Darlington County, SC is 567 square miles.
Tillamook County, Oregon is 1,133 square miles.
Hennepin County, Minnesota is 606 square miles.
Fayette County, Tennessee is 706 square miles.
Knox County which has Knoxville as its county seat has an area of about 526 square miles.
495 square miles.
Meade County has an area of 3,482 square miles.
Ware County, Georgia covers 906.31 square miles.