Nelly Erichsen (9 December 1862 – 15 November 1918) was an English illustrator and painter. Born in Newcastle upon Tyne, she was born into a wealthy professional Danish family. After studies at the Royal Academy of Art in the 1880s, she pursued a successful career as an illustrator and writer, working with a number of publishing firms including J.M. Dent and Macmillan, and jointly publishing travel books with Janet Ross, a prominent member of the Anglo-Tuscan pre-War community. In July 2018 Nelly Erichsen - A Hidden Life, a biography of Erichsen by Sarah Harkness was published.