Herillus of Carthage was a Stoic philosopher active in the 3rd century BCE. He was a student of Zeno of Citium, the founder of the Stoic school, and studied under him in Athens. Although ancient sources call him a Carthaginian, he was likely of Greek origin. Beyond this, the specific details of his life are not recorded.

He is reported to have written several philosophical works, but none survive today. Later sources list titles attributed to him, such as On Law, On the Passions, and Against Chrysippus. These works are completely lost and are known only by their titles or through brief references by other authors.

His historical importance stems from his departure from mainstream Stoic doctrine. While orthodox Stoics defined the goal of life as "living in accordance with virtue," Herillus argued that knowledge itself was the ultimate end. According to modern scholars, this heterodox view led some ancient writers to see him as only partially aligned with Stoicism. His position sparked early internal debate within the Stoic school and was later criticized by figures like Chrysippus. He is therefore remembered as an example of the philosophical diversity that existed among the first generation of Stoics.