Alexander Numenius (Ancient Greek: Ἀλέξανδρος Νουμήνιος), or (according to the Suda) Alexander, son of Numenius (Ἀλέξανδρος ὁ Νουμηνίου), was a Greek rhetorician who flourished in the first half of the 2nd century.
The one which certainly is his work bears the title Περὶ τῶν τῆς διανοίας καὶ τῆς λέξεως σχημάτων Peri ton tes dianoias kai tes lexeos schematon.
Julius Rufinianus, in his work on the same subject expressly states that Aquila Romanus, in his Latin treatise De Figuris Sententiarum et Elocutionis, took his materials from Alexander's work.
They are also contained in Walz's Rhetores Graeci, vol.
The genuine work of Alexander Numenius has also been edited, together with Minucianus and Phoebammon, by L. Normann, with a Latin translation and useful notes, Upsala, 1690, 8vo.