Bad Zurzach is a village and former municipality in the district of Zurzach in the canton of Aargau in Switzerland. It is the seat of the district. On 1 January 2022 the former municipalities of Bad Zurzach, Baldingen, Böbikon, Kaiserstuhl, Rekingen, Rietheim, Rümikon and Wislikofen merged into the new municipality of Zurzach. Bad Zurzach was previously known as Zurzach; the population voting for the official name change in a referendum of 21 May 2006.