Roger Mortimer is a New Zealand artist born in 1956 in Mangakino, who holds a Bachelor of Fine Arts from the Elam School of Fine Arts, University of Auckland. He lives and works in New Zealand.

A self-described "contemporary visual mythologist," Mortimer overlays current marine charts of Aotearoa with medieval imagery drawn from fifteenth-century illuminated manuscripts of Dante's Divine Comedy. The resulting map-paintings — meticulous coastlines populated by saints, sea monsters, heraldry and allegorical figures — give a post-colonial reading of the charting of New Zealand, turning stories of navigation into moral allegory. His Dante-inspired work won the Paramount Award at the 2014 Wallace Art Awards, after which he undertook the International Studio and Curatorial Program (ISCP) residency in New York.

Mortimer showed with REDBASE in the group exhibition Tales of East and West (2024) and the solo exhibition Adams Island (2025) at its Sydney gallery. He has exhibited widely across New Zealand and internationally, including the survey Dilemma Hill at Pātaka Art + Museum, Porirua, and the Gus Fisher Gallery, Auckland (2017), and at Christie's, Paris; he is represented by Föenander Galleries, Auckland, and Milford Galleries, Dunedin. His map paintings are the subject of the monograph Apocrypha: The Maps of Roger Mortimer (2021), and his work is held in collections including The Arts House Trust (formerly the Wallace Arts Trust), the University of Auckland, and the New Zealand Ministry of Foreign Affairs.