| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Merrifield, Fairfax | 22081, 22116 |
| Postal/ZIP Codes in Mosby, Fairfax | 22042 |
| Postal/ZIP Codes in Mount Vernon, Fairfax | 22121 |
| Postal/ZIP Codes in Newington, Fairfax | 22122 |
| Postal/ZIP Codes in North Springfield, Fairfax | 22151 |
| Postal/ZIP Codes in Northern Virginia, Fairfax | 22081 |
| Postal/ZIP Codes in Oak Hill, Fairfax | 20171 |
| Postal/ZIP Codes in Oakton, Fairfax | 22124 |
| Postal/ZIP Codes in Pimmit, Fairfax | 22043 |
| Postal/ZIP Codes in Reston, Fairfax | 20190, 20191, 20194 |
| Postal/ZIP Codes in Seven Corners, Fairfax | 22044 |
| Postal/ZIP Codes in Springfield, Fairfax | 22150, 22151, 22152, 22153, 22159, … |
| Postal/ZIP Codes in Sully Station, Fairfax | 20120 |
| Postal/ZIP Codes in Tysons, Fairfax | 22102, 22182 |
| Postal/ZIP Codes in Tysons Corner, Fairfax | 22102, 22182 |
| Postal/ZIP Codes in Vienna, Fairfax | 22180, 22181, 22182, 22185 |
| Postal/ZIP Codes in West McLean, Fairfax | 22102 |
| Postal/ZIP Codes in West Springfield, Fairfax | 22152 |