ZIP Code 20859 is located in Potomac Maryland. 20859 is entirely within Montgomery County. Regionally, 20859 is located in Metro DC.
| ZIP Code Name | Potomac |
| Primary County | Montgomery County |
| ZIP Code Type | PO Box |
| Current Time | EST |
| Coordinates | 39.01939774,-77.21094513 |
| Adjacent ZIP Codes | |
| Region | Metro DC |
| Metropolitan/Micropolitan Stat Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| Time Zone | Eastern Standard Time |
| IANA Timezone | America/New_York |
| School Districts in 20859 | |
| Elementary Schools in 20859 | |
| Middle Schools in 20859 | |
| High Schools in 20859 |