ZIP Code 03821 is located in Dover New Hampshire. 03821 is entirely within Strafford County. Regionally, it is located in the Southern New Hampshire Region.
| ZIP Code Name | Dover |
| Primary County | Strafford County |
| ZIP Code Type | PO Box |
| Current Time | EDT |
| Coordinates | 43.19478226,-70.87652588 |
| Adjacent ZIP Codes | |
| Region | Southern New Hampshire Region |
| Metropolitan/Micropolitan Stat Area | Boston-Cambridge-Newton, MA-NH |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |