| Bad Kösen | |
| Stadtteil of Naumburg | |
| Weir of the Saale river and old water mill | |
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Bad Kösen
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| Coordinates | |
| Administration | |
| Country | Germany |
| State | Saxony-Anhalt |
| District | Burgenlandkreis |
| Town | Naumburg |
| Basic statistics | |
| Area | 35.72 km2 (13.79 sq mi) |
| Elevation | 115 m (377 ft) |
| Population | 5,360 (31 December 2006) |
| - Density | 150 /km2 (389 /sq mi) |
| Other information | |
| Time zone | CET/CEST (UTC+1/+2) |
| Licence plate | BLK |
| Postal code | 06628 |
| Area code | 034463 |
| Website | Official website |
' (pop. 5746) (2001) is a spa town in Germany, on the Saale river in the small German wine-growing region of Saale-Unstrut. It is a former municipality in the Burgenlandkreis district, in Saxony-Anhalt. Since 1 January 2010, it is part of the town Naumburg.
Bad Kösen, and the nearby Rudelsburg castle with its memorials to the German Student Corps, is the location of the annual convention of the Kösener Senioren-Convents-Verband. In sight of the Rudelsburg is the ruin of the nearby Saaleck castle.
Bad Kösen was the seat of the former Verwaltungsgemeinschaft ("collective municipality") Bad Kösen.