Potomac zipcode
| City | Potomac |
| ZIP Code | 20859 |
| Type | PO Box |
| State Code | MD |
| State | Maryland |
ZIP code of Potomac is 20859. This place is located in Maryland state in US. To send any postal service to Potomac, you must use 20859 zipcode.
The ZIP code 20859 is also used with 1 more city name of Maryland.
- Rockville, MD