Marcus Aurelius Olympius Nemesianus, Roman poet, a native of Carthage, flourished about AD 283.

He was a popular poet at the court of the Roman emperor Carus (Vopiscus , Carus, II). He wrote poems on the arts of fishing (Halieutica), aquatics (Nautica) and hunting (Cynegetica), but only a fragment of the last, 325 hexameter lines, has been preserved. It is neatly expressed in good Latin, and was used as a school text-book in the 9th century.

Four eclogues, formerly attributed to Titus Calpurnius Siculus, are now generally considered to be by Nemesianus, and the Praise of Hercules, generally printed in Claudian's works, may be by him.

Complete edition of the works attributed to him in E Bahrens, Poetae Latini Minores, iii. (1881); Cynegelica: ed. Moritz Haupt (with Ovid's Halleutica and Grattius Faliscus) 1838, and R Stern, with Grattius (1832); Italian translation with notes by LF Valdrighi (1876). The four eclogues are printed with those of Calpurnius in the editions of H Schenkl (1885) and EH Keene (1887); see L Cisorio, Studio sulle Egloghe di N. (1895) and Dell' imstaziore nelle Egloghe di N. (1896); and M Haupt, De Carminibus Bucolicis Calpurnii et N. (1853), the chief treatise on the subject.