Gunpowder zipcode
| City | Gunpowder |
| ZIP Code | 21010 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Gunpowder is 21010. This place is located in Maryland state in US. To send any postal service to Gunpowder, you must use 21010 zipcode.
The ZIP code 21010 is also used with 2 more city names of Maryland.
- Aber Prov Grd, MD
- Aberdeen Proving Ground, MD
You should avoid following 1 city name of Maryland to be used with the ZIP code 21010.
- Edgewood Arsenal, MD