Frederick zipcode
| City | Frederick |
| ZIP Code | 21701 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Frederick is 21701. This place is located in Maryland state in US. To send any postal service to Frederick, you must use 21701 zipcode.
The ZIP code 21701 is also used with 1 more city name of Maryland.
- Lewistown, MD
You should avoid following 1 city name of Maryland to be used with the ZIP code 21701.
- Hood College, MD