Iamblichus the Novelist was a 2nd-century CE Syrian author, known solely for writing a Greek novel. The 10th-century Byzantine encyclopedia, the Suda, provides biographical details, identifying him as a Syrian fluent in both Syriac and Greek, and a "Babylonian," likely referring to the region of Babylon within Roman Syria. While the Suda also claims he was a freedman who gained prominence through education and military service, modern scholars view these details with skepticism. He is distinct from the later Neoplatonist philosopher Iamblichus of Chalcis.

His only known work is the Babyloniaca, also called The Story of Sinonis and Rhodanes. Originally spanning 39 books, the novel is now lost except for a detailed plot summary in Photius's 9th-century Bibliotheca and a few papyrus fragments. The Babyloniaca is significant as one of the few ancient Greek novels for which a substantial synopsis survives.

Its intricate plot features the lovers Sinonis and Rhodanes, the tyrannical King Garmus, adventures across Mesopotamia, and magical elements. The work provides an important, though fragmentary, example of the cross-cultural nature of Roman-era literature and its potential incorporation of Near Eastern storytelling traditions.