| Native Name: | Grafschaft Stadion-Thannhausen |
| Conventional Long Name: | County of Stadion-Thannhausen |
| Common Name: | Stadion-Thannhausen |
| Era: | Middle Ages |
| Status: | Vassal |
| Empire: | Holy Roman Empire |
| Government Type: | Principality |
| Year Start: | 1741 |
| Year End: | 1806 |
| Event Start: | Partitioned from Stadion |
| Event End: | Mediatised to Bavaria |
| P1: | Stadion (state) |
| S1: | Kingdom of Bavaria |
| Flag S1: | Flag of Bavaria (lozengy).svg |
| Capital: | Thannhausen |
Stadion-Thannhausen was a county located in and around Thannhausen in western Bavaria, Germany. Stadion-Thannhausen was a partition of the county of Stadion, and was mediatised to Bavaria in 1806.