SMS Baden was a Bayern-class dreadnought battleship of the German Imperial Navy built during World War I. Launched in October 1915 and completed in March 1917, she was the last battleship completed for use in the war; two of her sisters—Sachsen and Württemberg—were incomplete when the war ended. The ship mounted eight 38-centimeter (15 in) guns in four twin turrets, displaced 32,200 metric tons at full combat load, and had a top speed of 21 knots. Along with her sister Bayern, Baden was the largest and most powerfully armed battleship built by the Imperial Navy.

The Bayern class was a class of four super-dreadnought battleships built by the German Kaiserliche Marine. The class comprised Bayern, Baden, Sachsen, and Württemberg. Construction started on the ships shortly before World War I; Baden was laid down in 1913, Bayern and Sachsen followed in 1914, and Württemberg, the final ship, was laid down in 1915. Only Baden and Bayern were completed, due to shipbuilding priorities changing as the war dragged on. It was determined that U-boats were more valuable to the war effort, and so work on new battleships was slowed and ultimately stopped altogether. As a result, Bayern and Baden were the last German battleships completed by the Kaiserliche Marine.