Karl Caspar (March 13, 1879 – September 21, 1956) was a German painter who lived and worked mainly in Munich.

Karl Caspar studied at the State Academy of Fine Arts Stuttgart and the Academy of Fine Arts in Munich. In 1904 Caspar became a member of the Stuttgarter Künstlerbund (Stuttgart Artists' Association), and in 1906 he joined the Deutscher Künstlerbund (German Artists' Association). In 1907 he married fellow-painter and childhood friend and neighbor, Maria Filser. In 1913, he was a founding member of the artists' association Münchener Neue Secession, to which painters like Alexej von Jawlensky, Adolf Erbslöh, Wladimir von Bechtejeff, Paul Klee, and Alexander Kanoldt also belonged. In 1919 he became the chairman of the associati...