Amelius Gentilianus was a Neoplatonic philosopher active in the Roman Empire during the 3rd century CE. Originally from Etruria in Italy, he was a close disciple of the founder of Neoplatonism, Plotinus, and studied under him in Rome for over twenty years. Before joining Plotinus, he was also a student of the philosopher Numenius.

His primary role was as a recorder and defender of his teachers' ideas. He was a prolific writer, known for transcribing lectures and composing treatises, but almost all of his work is lost. The main writings attributed to him are a collection of philosophical letters, which do not survive. According to modern scholars, his historical importance lies in his key position within the early Neoplatonic school. As Plotinus's long-term student, he helped preserve the oral teachings that later formed the core of Plotinus's published works. His move to Apamea in Syria after Plotinus's death is also seen as a potential link in the geographical spread of Neoplatonic philosophy.