Explore the neighborhoods in Fairfax County and beyond! When you visit Fairfax, you'll learn we're not only a fun destination, but also a BIG destination. We have over a million people living here and we're home to George Mason University and other major colleges. We're connected to the world by Dulles International Airport and we're accessible domestically by miles of major roadways and railways. And with a landmass totaling over 400 sq. miles and bordering the nation's capital, it's easy to understand why some people come to us to learn what all there is to see and do.