| Type: | Stadtteil |
| Town: | Arendsee |
| Coordinates: | 52.85°N 11.4833°W |
| State: | Sachsen-Anhalt |
| District: | Altmarkkreis Salzwedel |
| Elevation: | 31 |
| Area: | 11.19 |
| Population: | 165 |
| Stand: | 2008-12-31 |
| Postal Code: | 39619 |
| Area Code: | 039384 |
| Licence: | SAW |
Thielbeer is a village and a former municipality in the district Altmarkkreis Salzwedel, in Saxony-Anhalt, Germany. Since 1 January 2010, it is part of the town Arendsee.