| Type: | Stadtteil |
| Town: | Arnstein |
| Image Coa: | Wappen Welbsleben.png |
| Coordinates: | 51.7°N 36°W |
| State: | Sachsen-Anhalt |
| District: | Mansfeld-Südharz |
| Elevation: | 200 |
| Area: | 9.06 |
| Population: | 743 |
| Stand: | 2006-12-31 |
| Postal Code: | 06333 |
| Area Code: | 03473 |
Welbsleben is a village in the town of Arnstein, in the Mansfeld-Südharz district of Saxony-Anhalt, Germany. Before 1 January 2010 it was a municipality.