Bad Wildungen's first documentary mention came about 800 from the Hersfeld Monastery's goods directory under the name "villa Wildungun". This place lay in the Wilde Valley, east of today's main town. About 1200, a castle was built by the Thuringian Landgraves, around which Alt-Wildungen ("High Wildungen") (from lat. altus = high) developed. In 1242, Nieder-Wildungen ("Lower Wildungen"), which had been founded on the hill facing the castle, was granted town rights. From 1263, the castle and the two Wildungen towns were owned by the Counts � later Princes � of Waldeck, who only abdicated after the First World War (see Principality of Waldeck). In 1358, the two Wildungen towns were mentioned.
In 1906, the town of Nieder-Wildungen was given the new name Bad Wildungen. In 1940, Bad Wildungen was given the title of "Preu�isches Staatsbad" ("Prussian State Bath")
In the time when alleged witches were persecuted, 78 people in Bad Wildungen fell victim to witch trials. At the time, Wildungen had 1200 inhabitants. The persecution came in waves of trials: 1532, 1629 to 1631 and 1650 to 1664.
The neighbouring communities of Alt-Wildungen, Reitzenhagen and Reinhardshausen were amalgamated in 1940. As part of municipal reform, the same was done in 1971 with Albertshausen, Armsfeld, Bergfreiheit, Braunau, Frebershausen, H�ddingen, Hundsdorf, Mandern, Odershausen and Wega
