Karl Wilhelm Ferdinand Solger (28 November 1780, Schwedt – 20 October 1819, Berlin) was a German philosopher and academic. He is known as a theorist of Romanticism, and of irony.
Solger's extensive studies included attending Friedrich Wilhelm Joseph Schelling's Darstellung meines Systems der Philosophie [Presentation of My System of Philosophy] lectures at the University of Jena in 1800–01 and Johann Gottlieb Fichte's "Wissenschaftslehre" lectures in Berlin 1804. In 1811, Solger became professor of philosophy at the University of Berlin