Frederick zipcode
| City | Frederick |
| ZIP Code | 21709 |
| Type | Company/Organization |
| State Code | MD |
| State | Maryland |
ZIP code of Frederick is 21709. This place is located in Maryland state in US. To send any postal service to Frederick, you must use 21709 zipcode.
You should avoid following 1 city name of Maryland to be used with the ZIP code 21709.
- State Farm Ins Co, MD