Bad Zurzach was a municipality in Zurzach in the canton of Aargau in Switzerland. It was the seat of the district. Bad Zurzach was known as Zurzach. On 1 January 2022, the former municipalities of Bad Zurzach, Baldingen, Böbikon, Kaiserstuhl, Rekingen, Rietheim, Rümikon and Wislikofen merged to form the new municipality of Zurzach.