| Type: | Village |
| Town: | Möckern |
| Image Coa: | DE-ST 15-0-86-140 Theessen COA.png |
| Coordinates: | 52.25°N 15°W |
| State: | Sachsen-Anhalt |
| District: | Jerichower Land |
| Elevation: | 57 |
| Area: | 22.04 |
| Population: | 505 |
| Stand: | 2006-12-31 |
| Postal Code: | 39291 |
| Area Code: | 039223 |
Theeßen is a former municipality in the Jerichower Land district, in Saxony-Anhalt, Germany. On 19 January 2008, it was incorporated into the town Möckern.