Frederick zipcode
| City | Frederick |
| ZIP Code | 21704 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Frederick is 21704. This place is located in Maryland state in US. To send any postal service to Frederick, you must use 21704 zipcode.
The ZIP code 21704 is also used with 1 more city name of Maryland.
- Urbana, MD