Konstantinos M. Mitsopoulos (Greek: Κωνσταντίνος Μ. Μητσόπουλος; c. 1844–1911) was a writer, geologist, mineralogist, chemist, and professor.

He followed in his uncle's footsteps, and was the first student to receive a doctorate degree in the natural sciences at the University of Athens in 1868.

He studied at the University of Athens some of his professors were Dimitrios Stroumpos, Vassilios Lakon, and Anastassios Christomanos.

[7] Some of his professors included Hieronymous Theodor Richter, Clemens Winkler, Gustav Zeuner, and Ferdinand Reich.

While he was a student Konstantinos and Armin Junge improved the blowing apparatus for blowpipe mining.

Ten years later he also began to teach geology and mineralogy at the Athens Polytechnic University.

He also taught at the Industrial and Commercial Academy founded by Greek chemist Othon Roussopoulos.

He participated in a large number of international research projects along with Anastassios Christomanos and Timoleon Argyropoulos.

At his funeral, Anastasios Damvergis said he was an "unparalleled popularizer of scientific knowledge and teaching, making the findings common to all of science.