Rockville zipcode
| City | Rockville |
| ZIP Code | 20850 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Rockville is 20850. This place is located in Maryland state in US. To send any postal service to Rockville, you must use 20850 zipcode.
The ZIP code 20850 is also used with 1 more city name of Maryland.
- Potomac, MD