Klettgau
| Klettgau  | |
|---|---|
| View of Erzingen | |
| Location of Klettgau  within Waldshut   district | |
| Coordinates: 47°39′30″N 08°25′22″E / 47.65833°N 8.42278°E | |
| Country | Germany | 
| State | Baden-Württemberg | 
| Admin. region | Freiburg | 
| District | Waldshut | 
| Government | |
| • Mayor (2016–24) | Ozan Topcuogullari | 
| Area | |
|  • Total | 45.87 km2 (17.71 sq mi) | 
| Elevation | 409 m (1,342 ft) | 
| Population  (2023-12-31) | |
|  • Total | 7,519 | 
| • Density | 160/km2 (420/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| Postal codes | 79771 | 
| Dialling codes | 07742 | 
| Vehicle registration | WT | 
| Website | www.klettgau.de | 
Klettgau (High Alemannic: Chleggau) is a municipality in the district of Waldshut in Baden-Württemberg, Germany. It is the center of the Klettgau historical region stretching across the Swiss border into the cantons of Aargau, Schaffhausen, and Zürich.
The municipal area includes the villages of Bühl, Erzingen, Geißlingen, Grießen, Rechberg, Riedern am Sand, and Weisweil.