| Image Coa: | Wappen Grossthiemig.png |
| Coordinates: | 51.3831°N 13.6667°W |
| Image Plan: | Großthiemig in EE.png |
| State: | Brandenburg |
| District: | Elbe-Elster |
| Amt: | Schradenland |
| Elevation: | 113 |
| Area: | 20.10 |
| Postal Code: | 04932 |
| Area Code: | 035343 |
| Licence: | EE, FI, LIB |
| Gemeindeschlüssel: | 12 0 62 208 |
| Website: | www.grossthiemig.info |
| Mayor: | Heiko Imhof[1] |
| Leader Term: | 2024 - 29 |
| Party: | independent |
Großthiemig is a municipality in the Elbe-Elster district, in Brandenburg, Germany.
From 1952 to 1990, Großthiemig was part of the Bezirk Cottbus of East Germany.