| Image Coa: | Wappen Wellendingen.svg |
| Coordinates: | 48.1478°N 8.7008°W |
| Image Plan: | Wellendingen in RW.svg |
| State: | Baden-Württemberg |
| Region: | Freiburg |
| District: | Rottweil |
| Elevation: | 638 |
| Area: | 17.47 |
| Postal Code: | 78669 |
| Area Code: | 07426 |
| Licence: | RW |
| Gemeindeschlüssel: | 08 3 25 064 |
| Website: | www.wellendingen.de |
| Mayor: | Thomas Albrecht[1] |
| Leader Term: | 2024 - 32 |
Wellendingen is a town in the district of Rottweil, in Baden-Württemberg, Germany.