| Daade | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Rhineland-Palatinate |
| Subdivision Type3: | Reference no. |
| Subdivision Name3: | DE: 27228 |
| Source1 Location: | Not far from the Stegskopf in the High Westerwald (above Emmerzhausen) |
| Source1 Coordinates: | 50.7067°N 8.0246°W |
| Source1 Elevation: | ca. |
| Mouth Location: | On the eastern edge of Alsdorf into the Heller |
| Mouth Coordinates: | 50.7818°N 7.8929°W |
| Mouth Elevation: | ca. |
| Custom Label: | References |
The Daade (also called the Daadenbach) is the largest tributary of the River Heller, in the district of Altenkirchen in the northeast of the German state of Rhineland-Palatinate. It flows through the northeastern part of the Westerwald. It is long and has a catchment area of .[1]
The Daade Valley Railway runs along the Daade from Daaden via Alsdorf to Betzdorf, on the main line from Cologne to Siegen.
The villages on the Daade are:
The tributaries of the Daade (in downstream order) are the:
All left tributaries have their sources on the Neunkhausen-Weitefeld Plateau, but cut deep valleys in the Heller Upland.