Dr Leonhard Schmitz FRSE LLD (1807 – May 1890) was a Prussian-born classical scholar and educational author, mainly active in the United Kingdom. He is sometimes referred to in the Anglicised version of his name Leonard Schmitz.
He attended gymnasium in Aix-la-Chappelle to the east (now called Aachen and within modern day Germany). He lost his right arm in an accident at the age of 10, but nonetheless excelled academically. He studied at the University of Bonn, where he earned a PhD, and was in particular influenced by Barthold Georg Niebuhr; Schmitz later published in England a collection of notes taken from Niebuhr's lectures as Lectures on Roman History (1844).
He became associated with a number of scholars there, writing many of the mythological entries for classicist William Smith's Dictionary of Greek and Roman Biography and Mythology, and serving as "a key figure in the transmission of German classical scholarship to Victorian Britain".
In his induction speech he expressed the hope that his appointment would be "the means of strengthening and increasing the intellectual sympathy which has so long existed between this country and Germany". In that office in 1859 he also tutored The Prince of Wales in Roman history.
Schmitz moved back to England in 1866, serving as Principal of London International College from 1866 to 1874, and Classical Examiner at the University of London from 1874 to 1884. He was granted a civil list pension of £50 in 1881, doubled in 1886.