Philostratus the Lemnian was a Greek sophist of the late second and early third centuries CE, active during the period of the Second Sophistic. His epithet distinguishes him from other intellectuals in the extended Philostrati family and indicates an association with the island of Lemnos. He was a student of Hippodromus of Larissa and the teacher of Apsines of Gadara, placing him within a clear pedagogical lineage.

Philostratus the Athenian describes him as an orator who employed a plain and concise style, specializing in epideictic oratory. His only surviving work is the Heroicus, a prose dialogue. This text is a unique cultural artifact that illuminates the preoccupations of the educated Greek elite under Roman rule. It engages with Homeric criticism, local hero cults, and the mythology of the Trojan War, showcasing the period's sophisticated engagement with the classical past.

His significance lies both as the author of the Heroicus and as a connective figure between major sophists, highlighting the institutional networks of rhetorical education during the Second Sophistic.