| Type: | Stadt |
| Image Coa: | Wappen Todtnau.svg |
| Coordinates: | 47.8333°N 64°W |
| Image Plan: | Todtnau in LÖ.svg |
| Plantext: | Location of Todtnau in Lörrach District |
| State: | Baden-Württemberg |
| Region: | Freiburg |
| District: | Lörrach |
| Elevation: | 659 |
| Area: | 69.60 |
| Postal Code: | 79674 |
| Area Code: | 07671 |
| Licence: | LÖ |
| Gemeindeschlüssel: | 08 3 36 087 |
| Mayor: | Oliver Fiedel[1] |
| Leader Term: | 2023 - 31 |
Todtnau is a town in the district of Lörrach in Baden-Württemberg, Germany. As of 2009 its population was of 4,932.
It is situated in the Black Forest, on the river Wiese, 20 km southeast of Freiburg.
The municipality counts 8 civil parishes (Ortsteil):