Founded in 1742, Fairfax County is one of 95 counties in the state of Virginia. Historically, Fairfax County was formed from Prince William County. The city of Fairfax is the county seat. With FIPS code of 59, Fairfax County has a population of 1,139,720 and area of 396 square miles (1,026 km2).
List of all cities in Fairfax County, VA alphabetically
| City/Town | Postal Code | County | Area Code |
| Alexandria, VA | 22303 | Fairfax County | 703/571 |
| 22306 | Fairfax County | 703/571 | |
| 22307 | Fairfax County | 703/571 | |
| 22308 | Fairfax County | 703/571 | |
| 22309 | Fairfax County | 703/571 | |
| 22310 | Fairfax County | 703/571 | |
| 22312 | Fairfax County | 703/571 | |
| 22315 | Fairfax County | 703/571 | |
| Annandale, VA | 22003 | Fairfax County | 703/571 |
| Army Times, VA | 22158 | Fairfax County | 703/571 |
| 22159 | Fairfax County | 703/571 | |
| AT&T, VA | 22185 | Fairfax County | 703/571 |
| Baileys Crossroads, VA | 22041 | Fairfax County | 703/571 |
| Bank of America, VA | 22118 | Fairfax County | 703/571 |
| Belleview, VA | 22307 | Fairfax County | 703/571 |
| BRM-Firm ZIP, VA | 22158 | Fairfax County | 703/571 |
| Burke, VA | 22009 | Fairfax County | 703/571 |
| 22015 | Fairfax County | 703/571 | |
| Business Reply Mail, VA | 22095 | Fairfax County | 703/571 |
| Centreville, VA | 20120 | Fairfax County | 703/571 |
| 20121 | Fairfax County | 703/571 | |
| 20122 | Fairfax County | 703/571 | |
| Chantilly, VA | 20151 | Fairfax County | 703/571 |
| 20153 | Fairfax County | 703/571 | |
| Clifton, VA | 20124 | Fairfax County | 703/571 |
| Community, VA | 22306 | Fairfax County | 703/571 |
| Corners, VA | 22044 | Fairfax County | 703/571 |
| Dept of Commerce, VA | 22161 | Fairfax County | 703/571 |
| Dunn Loring, VA | 22027 | Fairfax County | 703/571 |
| Engineering Support Center, VA | 22082 | Fairfax County | 703/571 |
| Engleside, VA | 22309 | Fairfax County | 703/571 |
| Fairfax, VA | 20151 | Fairfax County | 703/571 |
| 20153 | Fairfax County | 703/571 | |
| 22031 | Fairfax County | 703/571 | |
| 22032 | Fairfax County | 703/571 | |
| 22033 | Fairfax County | 703/571 | |
| 22034 | Fairfax County | 703/571 | |
| 22035 | Fairfax County | 703/571 | |
| 22036 | Fairfax County | 703/571 | |
| 22037 | Fairfax County | 703/571 | |
| 22039 | Fairfax County | 703/571 | |
| Fairfax County Government, VA | 22035 | Fairfax County | 703/571 |
| Fairfax Station, VA | 22039 | Fairfax County | 703/571 |
| Falls Church, VA | 22041 | Fairfax County | 703/571 |
| 22042 | Fairfax County | 703/571 | |
| 22043 | Fairfax County | 703/571 | |
| 22044 | Fairfax County | 703/571 | |
| Firm Zip, VA | 22156 | Fairfax County | 703/571 |
| 22159 | Fairfax County | 703/571 | |
| Fort Belvoir, VA | 22060 | Fairfax County | 703/571 |
| Franconia, VA | 22310 | Fairfax County | 703/571 |
| Franconia, VA | 22315 | Fairfax County | 703/571 |
| Fx Station, VA | 22039 | Fairfax County | 703/571 |
| Gannett, VA | 22107 | Fairfax County | 703/571 |
| Great Falls, VA | 22066 | Fairfax County | 703/571 |
| Greenway, VA | 22067 | Fairfax County | 703/571 |
| Herndon, VA | 20170 | Fairfax County | 703/571 |
| 20171 | Fairfax County | 703/571 | |
| 20172 | Fairfax County | 703/571 | |
| 20190 | Fairfax County | 703/571 | |
| 20191 | Fairfax County | 703/571 | |
| 20192 | Fairfax County | 703/571 | |
| 20194 | Fairfax County | 703/571 | |
| 20195 | Fairfax County | 703/571 | |
| 20196 | Fairfax County | 703/571 | |
| 22095 | Fairfax County | 703/571 | |
| 22096 | Fairfax County | 703/571 | |
| Hundon, VA | 20192 | Fairfax County | 703/571 |
| 20196 | Fairfax County | 703/571 | |
| Jefferson Manor, VA | 22303 | Fairfax County | 703/571 |
| Journal Newspaper, VA | 22034 | Fairfax County | 703/571 |
| 22036 | Fairfax County | 703/571 | |
| Kingstowne, VA | 22315 | Fairfax County | 703/571 |
| Lorton, VA | 22079 | Fairfax County | 703/571 |
| 22199 | Fairfax County | 703/571 | |
| Maclean, VA | 22101 | Fairfax County | 703/571 |
| 22102 | Fairfax County | 703/571 | |
| 22103 | Fairfax County | 703/571 | |
| Mason Neck, VA | 22079 | Fairfax County | 703/571 |
| Mc Lean, VA | 22067 | Fairfax County | 703/571 |
| 22101 | Fairfax County | 703/571 | |
| 22102 | Fairfax County | 703/571 | |
| 22103 | Fairfax County | 703/571 | |
| 22106 | Fairfax County | 703/571 | |
| 22107 | Fairfax County | 703/571 | |
| 22108 | Fairfax County | 703/571 | |
| 22109 | Fairfax County | 703/571 | |
| Merrifield, VA | 22081 | Fairfax County | 703/571 |
| 22082 | Fairfax County | 703/571 | |
| 22116 | Fairfax County | 703/571 | |
| 22118 | Fairfax County | 703/571 | |
| 22119 | Fairfax County | 703/571 | |
| Mobil Oil Corp, VA | 22037 | Fairfax County | 703/571 |
| Mosby, VA | 22042 | Fairfax County | 703/571 |
| Mount Vernon, VA | 22121 | Fairfax County | 703/571 |
| National Right to Work Comm, VA | 22160 | Fairfax County | 703/571 |
| Navy Federal Credit Union, VA | 22119 | Fairfax County | 703/571 |
| Newington, VA | 22122 | Fairfax County | 703/571 |
| North Springfield, VA | 22151 | Fairfax County | 703/571 |
| Northern Virginia, VA | 22081 | Fairfax County | 703/571 |
| Northern Virginia Facility, VA | 22081 | Fairfax County | 703/571 |
| Oak Hill, VA | 20171 | Fairfax County | 703/571 |
| Oakton, VA | 22124 | Fairfax County | 703/571 |
| 22185 | Fairfax County | 703/571 | |
| Pimmit, VA | 22043 | Fairfax County | 703/571 |
| Reston, VA | 20190 | Fairfax County | 703/571 |
| 20191 | Fairfax County | 703/571 | |
| 20192 | Fairfax County | 703/571 | |
| 20194 | Fairfax County | 703/571 | |
| 20195 | Fairfax County | 703/571 | |
| 20196 | Fairfax County | 703/571 | |
| 22095 | Fairfax County | 703/571 | |
| 22096 | Fairfax County | 703/571 | |
| Richmond, VA | 22109 | Fairfax County | 703/571 |
| 22118 | Fairfax County | 703/571 | |
| Seven Corners, VA | 22044 | Fairfax County | 703/571 |
| Springfield, VA | 22009 | Fairfax County | 703/571 |
| 22015 | Fairfax County | 703/571 | |
| 22150 | Fairfax County | 703/571 | |
| 22151 | Fairfax County | 703/571 | |
| 22152 | Fairfax County | 703/571 | |
| 22153 | Fairfax County | 703/571 | |
| 22156 | Fairfax County | 703/571 | |
| 22158 | Fairfax County | 703/571 | |
| 22159 | Fairfax County | 703/571 | |
| 22160 | Fairfax County | 703/571 | |
| 22161 | Fairfax County | 703/571 | |
| Sprint, VA | 20196 | Fairfax County | 703/571 |
| 22096 | Fairfax County | 703/571 | |
| Sully Station, VA | 20120 | Fairfax County | 703/571 |
| U S Geological Survey, VA | 20192 | Fairfax County | 703/571 |
| USA Today, VA | 22108 | Fairfax County | 703/571 |
| Vienna, VA | 22027 | Fairfax County | 703/571 |
| 22124 | Fairfax County | 703/571 | |
| 22180 | Fairfax County | 703/571 | |
| 22181 | Fairfax County | 703/571 | |
| 22182 | Fairfax County | 703/571 | |
| 22183 | Fairfax County | 703/571 | |
| 22185 | Fairfax County | 703/571 | |
| Wachovia Bank, VA | 22109 | Fairfax County | 703/571 |
| West McLean, VA | 22102 | Fairfax County | 703/571 |
| 22103 | Fairfax County | 703/571 | |
| West Springfield, VA | 22152 | Fairfax County | 703/571 |