Karl Bopp (28 March 1877 – 5 December 1934) was a German historian of mathematics.
In 1906 he habilitated with a work about the conic sections of Grégoire de Saint-Vincent, and in 1915 he became professor extraordinarius in Heidelberg.
As successor of Moritz Cantor he taught history of mathematics, political arithmetic, and Insurance.
Bopp's special field of interest were researches about Johann Heinrich Lambert.
He edited Lambert's Monatsbuch, his letter exchanges with Leonhard Euler and Abraham Gotthelf Kästner, and his philosophical writings.