Mary Victoria Cowden Clarke (née Novello; 22 June 1809 – 12 January 1898) was an English author. She was the eldest daughter of Vincent Novello. In 1828, she married her brother Alfred's business partner, Charles Cowden Clarke, and worked with him on Shakespeare studies.
In the year after her marriage, Mary Cowden Clarke began her valuable Shakespeare concordance, which was eventually issued in eighteen monthly parts (1844–1845), and in volume form in 1845 as The Complete Concordance to Shakespeare, being a Verbal Index to all the Passages in the Dramatic Works of the Poet. This work superseded the Copious Index to ... Shakespeare (1790) of Samuel Ayscough, and the Complete Verbal Index ... (1805–1807) of Francis Twiss.
"Clarke, Mrs. (Mary Victoria Novello, usually known as Mrs. Cowden Clarke)" The Century Cyclopedia of Names: A Pronouncing and Etymological Dictionary of Names in Geography, Biography, Mythology, History, Ethnology, Art, Archæology, Fiction, Etc. New York: Century Co, 1904.