ZIP Code 21721 is located in Chewsville Maryland. 21721 is entirely within Washington County. Regionally, it is located in the Hagerstown Area.
| ZIP Code Name | Chewsville |
| Primary County | Washington County |
| ZIP Code Type | PO Box |
| Current Time | EDT |
| Coordinates | 39.64300537,-77.63400269 |
| Adjacent ZIP Codes | |
| Region | Hagerstown Area |
| Metropolitan/Micropolitan Stat Area | Hagerstown-Martinsburg, MD-WV |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |
| Area | 0.00124358 Square Miles |