Sosibius (Greek: Σωσίβιoς; lived 3rd century BC) was a Tarentine from Magna Graecia, one of the captains of the body-guards of Ptolemy Philadelphus (283–246 BC), king of Egypt. It is not improbable he may have been the father of Sosibius, minister of Ptolemy Philopator (221–204 BC).

•  This article incorporates text from a publication now in the public domain: Smith, William, ed. (1870). Dictionary of Greek and Roman Biography and Mythology. {{cite encyclopedia}}: Missing or empty |title= (help)