| Type: | Stadtteil |
| Town: | Gardelegen |
| Coordinates: | 52.5267°N 11.4667°W |
| State: | Sachsen-Anhalt |
| District: | Altmarkkreis Salzwedel |
| Elevation: | 58 |
| Area: | 19.84 |
| Population: | 510 |
| Stand: | 2006-12-31 |
| Postal Code: | 39638 |
| Area Code: | 03907 |
| Licence: | SAW |
Kloster Neuendorf is a village and a former municipality in the district Altmarkkreis Salzwedel, in Saxony-Anhalt, Germany. Since 1 July 2009, it is part of the town Gardelegen.