| Gelmke | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Lower Saxony |
| Subdivision Type3: | Reference no. |
| Subdivision Name3: | DE: 48214 |
| Length: | ca. |
| Source1 Location: | ENE of the Dicker Kopf in the Harz |
| Source1 Elevation: | ca. |
| Mouth Location: | near Oker (Goslar) into the Abzucht |
| Mouth Coordinates: | 51.91°N 10.476°W |
| Progression: | Abzucht→ |
| Basin Size: | [1] |
| Tributaries Right: | unnamed stream on the Brautstein |
| Custom Label: | References |
The Gelmke is a small stream, roughly 6km (04miles) long, and right-hand tributary of the Abzucht in Lower Saxony, Germany. The stream flows through part of the town of Goslar.
The Gelmke rises in the Gelmke Valley (Gelmketal) at about . Its source lies east-northeast of the hill known as the Dicker Kopf (668 m) and north of the Eichenberg (670 m).[2] It flows initially northwards through a densely wooded valley, where it is crossed by the E 11 European long-distance trail before emerging into open fields and swinging east, just above the old Goslar sewage ponds. It then heads north again to join the Abzucht near Goslar station.[2]