Martin Johannes Hammerich (4 December 1811 – 20 September 1881) was a Danish art historian, educator, author, and translator.

He then enrolled at the University of Copenhagen where he won the 2nd prize for a paper on freedmen in Ancient Rome before graduating in theology in 1833.

He had pointed out the unreasonableness of treating a Nordic subject in Latin in an application and was granted a dispensation despite King Frederik VI's concerns.

After his return to Denmark, he was a co-founder of the Liberal Student Society (Studentersamfund) alongside Carl Ploug (1813–1894), Andreas Frederik Krieger (1817–1893), Ditlev Gothard Monrad (1811–1887) and others, briefly serving as its chairman.

His interest in Ancient Indian culture had been inspired by reading Sacontalá or The Fatal Ring as translated by Danish consul Hans West (1758-1811).

In 1845, influenced by an improved version by Sanskrit scholar Otto von Böhtlingk (1815–1904), Hammerich published a Danish-language translation entitled Sacontala eller den uheldige Ring.

He also wrote a book on the oeuvre of sculptor Bertel Thorvaldsen (1770–1844) posthumously published as Om Fremstillingens Kunst i Retning af det almeenlæselige (1881).