Aspasius was a Peripatetic philosopher active during the Roman Imperial period, most likely in the early 2nd century CE. Very little is known about his personal life or origins. His historical importance stems from his role as one of the earliest known commentators on the works of Aristotle.

He is primarily known for writing commentaries on Aristotle's texts. His only surviving work is a commentary on Aristotle's Nicomachean Ethics, covering several of its books. This commentary is the earliest complete Greek commentary on any of Aristotle's works that has come down to us. According to modern scholars, he also wrote commentaries on other works by Aristotle, such as the Categories and Physics, but these are now lost.

Aspasius holds a pivotal place in the history of philosophy. His surviving commentary provides a crucial window into how Aristotle's ideas were taught and interpreted in the centuries after his death. His work represents the early Peripatetic scholarly tradition and was influential for later philosophers. Some academics suggest that his interpretations, particularly on topics like emotion and virtue, were cited and engaged with by significant later thinkers, including Alexander of Aphrodisias.