Johannes, 11th Prince of Thurn and Taxis (5 June 1926 – 14 December 1990) was a German businessman and head of the immensely wealthy, formerly princely Thurn und Taxis family from 1982 until his death.

Johannes was born in Regensburg, Germany, to Karl August, 10th Prince of Thurn and Taxis, and Infanta Maria Anna de Braganza. He had two older sisters and one younger brother.

In the 1970s Johannes threw avant-garde parties and, because he was bisexual, he was often seen in gay discos.

On 31 May 1980 he married the much younger Countess Gloria of Schönburg-Glauchau (born 1960). They were 4th cousin twice removed, both descended from Karl Alexander, 5th Prince of Thurn and Taxis. The Schönburg-Glauchaus were a mediatised branch of the Schönburg dynasty of counts, which still possessed large estates in Germany after World War I, but became refugees in Africa under the Nazi regime and fell on hard times. The couple attracted massive media attention into the mid 1980s, with a haut bohème lifestyle locating them among the jet set and the Princess Gloria's over-the-top appearance (characterized by bright hair color and flashy clothes) prompted Vanity Fair to describe her as "Princess TNT, the dynamite socialite", a sobriquet that stayed with her a long time. The couple had three children:

Upon the death of his father in 1982, Johannes became the head of the Thurn and Taxis family. On 14 December 1990 he died, after two heart transplants within 2 days, in Munich-Großhadern. He left U.S. $500 million in debts and his widow sobered her lifestyle to master the fiscal responsibilities of probating his estate and securing what remained of her son's fortune.

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