Below is a list of Fairfax County VA zip codes. For your research we have also included Fairfax County Area Code, Time Zone, UTC and the local County FIPS Code. Each Fairfax County Virginia zip code has a center Longitude / Latitude point (the Fairfax County center is -77.257499694824 / 38.861698150635). For your convenience we have also indicated if that zip code in Fairfax County observes Daylight Savings time.