Bad Sulza (German pronunciation: [baːt ˈzʊltsa] ⓘ) is a town in the Weimarer Land district, in Thuringia, Germany.

Within the German Empire (1871-1918), Bad Sulza was part of the Grand Duchy of Saxe-Weimar-Eisenach.

The former municipality Ködderitzsch was merged into Bad Sulza in January 2019, and Saaleplatte in December 2019.

In January 2023 Bad Sulza absorbed the former municipality Rannstedt.

[3] Media related to Bad Sulza at Wikimedia Commons