Mary Benwell (1739–after 1800), married name Codd, was an English artist, a miniaturist and pastellist.

[1] Benell's teachers may have included John Russell or Catherine Read.

[1] Benwell resided in Warwick Court, London, and exhibited crayon portraits and miniatures at the Incorporated Society of Artists and the Royal Academy between the years 1761 and 1791 and at The Society of Artists from 1762 to 1774.

[2] She worked also in oil colours and made a reputation in her profession, but she retired from it on her marriage about 1762 with a military officer named Codd (also Coode, Coade).

[3] There is a portrait of Queen Charlotte of Mecklenburg-Strelitz, engraved after her by Richard Houston; and another of Miss Brockhurst, by J. Saunders.