| Place Name | Joppa |
| Place Type | Unincorporated |
| ZIP Code(s) | 21085 |
| County | Harford County |
| Area Code(s) | 410,443,667 |
| Timezone | Eastern Standard Time (EST) |
| Population () | |
| Metro/Micro Stats Area | Baltimore-Columbia-Towson, MD |
| US Congressional District(s) | Maryland 1st |
| House of Delegates Districts | 07B |
| State Senate Districts | 07 |