Just like any county in the U.S., there are pockets of poorer areas. Fairfax circle, much of Annandale, a stretch of Chantilly, lots of Reston and Herndon, the apartments along Cedar Lane in Vienna, and a lot of Falls Church. If you're looking to avoid crime, stick to Vienna, Oakton, Oak Hill, or Fairfax Station.
Forum:
Fairfax County General