There are 334 Fast Food Restaurants in Fairfax County, Virginia, serving a population of 1,142,004 people in an area of 391 square miles. There is 1 Fast Food Restaurant per 3,419 people, and 1 Fast Food Restaurant per 1 square miles.
In Virginia, Fairfax County is ranked 65th of 133 counties in Fast Food Restaurants per capita, and 5th of 133 counties in Fast Food Restaurants per square mile.