Frederick zipcode
| City | Frederick |
| ZIP Code | 21702 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Frederick is 21702. This place is located in Maryland state in US. To send any postal service to Frederick, you must use 21702 zipcode.
The ZIP code 21702 is also used with 1 more city name of Maryland.
- Fort Detrick, MD
You should avoid following 1 city name of Maryland to be used with the ZIP code 21702.
- College Estates, MD