Hermann Masius (January 7, 1818 – May 22, 1893) was a German educator who was a native of Trebnitz (today a borough of Könnern).
He studied theology in Halle, and later was director of a secondary school in Halberstadt. In 1860 he became director of a Realschule in Dresden, and in 1862 was appointed professor of education at the University of Leipzig.
Among his numerous publications was a work on "nature studies" called Naturstudien. It was published over several editions, and acclaimed for its blending of natural and cultural history from an aesthetic standpoint. Another noted work of his was Die gesamten Naturwissenschaften (Complete Natural Sciences), of which he collaborated with other academic professionals.