| Type: | Stadtteil |
| Town: | Tangerhütte |
| Image Coa: | DE-ST 15-0-90-546 Demker COA.png |
| Coordinates: | 52.5067°N 11.8467°W |
| State: | Sachsen-Anhalt |
| District: | Stendal |
| Elevation: | 32 |
| Area: | 12.52 |
| Population: | 372 |
| Stand: | 2008-12-31 |
| Postal Code: | 39579 |
| Area Code: | 039365 |
| Licence: | SDL |
Demker is a village and a former municipality in the district of Stendal, in Saxony-Anhalt, Germany. Since 31 May 2010, it is part of the town Tangerhütte.[1]