Marcian of Heraclea (Ancient Greek: Μαρκιανός Ηρακλειώτης; Latin: Marcianus Heracleensis; fl. c. 4th century AD) was a Late Antiquity minor Greek geographer from Heraclea Pontica. His known works are:
Artemidorus and Menippus both likely wrote circa the 1st century CE. Only little survives of the epitomes, through citations in the work Stephanus of Byzantium, but in the case of Menippus there is also some manuscript material. From it, it seems Marcian had not improved much upon Menippus. Early in its publication history, the work of Pseudo-Scymnus has been attributed to Marcian. Apart from his writings, philologists believe that an annotated collection Marcian made of his sources in geography, formed the basis of today's extant manuscripts of these earlier works.