Adam Karl August von Eschenmayer (originally Carl; 4 July 1768 – 17 November 1852) was a German philosopher and physician.

After receiving his early education at the Caroline academy of Stuttgart, he entered the University of Tübingen, where he was given the degree of doctor of medicine.

He practised for some time as a physician at Sulz, and then at Kirchheim, and in 1811 he was chosen extraordinary professor of philosophy and medicine at Tübingen.

[1] Eschenmayer's views are largely identical with those of Friedrich Wilhelm Joseph Schelling, but he differed from him in regard to the knowledge of the absolute.

He believed that in order to complete the arc of truth, philosophy must be supplemented by what he called non-philosophy (German: Nichtphilosophie), a kind of mystical illumination by which was obtained a belief in God that could not be reached by mere intellectual effort.