| Type: | Ortsteil |
| Municipality: | Bördeaue |
| Image Coa: | Wappen Tarthun.png |
| Coordinates: | 51.9306°N 11.4728°W |
| State: | Sachsen-Anhalt |
| District: | Salzlandkreis |
| Elevation: | 67 |
| Area: | 8.62 |
| Population: | 814 |
| Stand: | 2006-12-31 |
| Postal Code: | 39435 |
| Area Code: | 039268 |
| Licence: | SLK |
Tarthun is a village and a former municipality in the district Salzlandkreis, in Saxony-Anhalt, Germany. Since 1 January 2010, it is part of the municipality Bördeaue.