Keymar zipcode
| City | Keymar |
| ZIP Code | 21757 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Keymar is 21757. This place is located in Maryland state in US. To send any postal service to Keymar, you must use 21757 zipcode.
The ZIP code 21757 is also used with 2 more city names of Maryland.
- Detour, MD
- Middleburg, MD