Basilides (Greek: Βασιλίδης) was a Byzantine official, who held the office of magister officiorum during the reign of Emperor Justinian I (r. 527–565). He was a member of the commission responsible for forming the Corpus Juris Civilis.
On February 13, 528, Basilides was appointed as a member of the commission preparing the Corpus Juris Civilis, serving under Tribonian. Their work was completed in 529. While this is the first chronological mention of him, the text of his appointment mentions him as being already a vir excellentissimus ("most excellent man"), a former praetorian prefect of the East and a patrician. His title of praetorian prefect has been suggested to be honorific, as modern historians find it strange that Basilides could have served in this high-ranking position prior to holding lower offices.
On April 7, 529, official texts mention Basilides as the serving praetorian prefect of Illyricum, a rank lower than his previous title of praetorian prefect of the East. A passage of the Greek Anthology mentions a "Basilius" (Greek: Βασίλειος, Basil) who had served as praetorian prefect of Illyricum and whose statue reportedly stood over the east gate of Thessalonica. Cyril Mango has suggested that this "Basilius" was actually Basilides.
In January 532, the Chronicon Paschale identifies Basilides as the deputy magister officiorum, replacing Hermogenes who had taken up military duties in the Iberian War against the Sassanid Empire. Basilides was eventually replaced by Strategius.