| Brunnenbach | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Lower Saxony |
| Subdivision Type3: | Location |
| Subdivision Name3: | west and south of Braunlage in Goslar district |
| Length Km: | 11.9 |
| Source1 Elevation: | over 720 m |
| Mouth Location: | into the Warme Bode |
| Mouth Elevation: | under 500 m |
| Waterbodies: | Reservoirs: Silberteich |
| Custom Label: | References |
The Brunnenbach is a long, right-hand tributary of the Warme Bode, which flows to the west and south of Braunlage in Goslar district in the north German state of Lower Saxony.
Shortly after its source the Brunnenbach is impounded by the Silberteich reservoir, before it continues in a southeasterly direction past the Mutter-Kind-Heim Waldmühle, a mother-and-child centre, and local campsite. It then passes the forest inn of Forellenteich and the forest youth centre of, before finally turning east. The Brunnenbach is one of the most important tributaries of the Warme Bode.