| Coordinates: | 52.1667°N 50°W |
| Image Plan: | Dettum in WF.svg |
| State: | Niedersachsen |
| District: | Wolfenbüttel |
| Samtgemeinde: | Sickte |
| Elevation: | 104 |
| Area: | 17.16 |
| Postal Code: | 38173 |
| Area Code: | 05333 |
| Licence: | WF |
| Gemeindeschlüssel: | 03 1 58 009 |
| Divisions: | 3 Ortsteile |
| Website: | www.dettum.de |
| Mayor: | Willi Dietzsch |
Dettum is a municipality in the district of Wolfenbüttel, in Lower Saxony, Germany.