ZIP Code 20172 is located in Herndon Virginia. 20172 is entirely within Fairfax County. Regionally, it is located in Metro DC.
| ZIP Code Name | Herndon |
| Primary County | Fairfax County |
| ZIP Code Type | PO Box |
| Current Time | EDT |
| Coordinates | 38.96754456,-77.38067627 |
| Adjacent ZIP Codes | |
| Region | Metro DC |
| Metropolitan/Micropolitan Stat Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |