以弗所的马克西穆斯（Maximus of Ephesus，?-371年），新柏拉图主义的哲学家和巫师。他是公元四世纪罗马皇帝尤利安的老师，对皇帝有很大的影响。

尤利安皇帝死后，他被皇帝瓦伦斯囚禁。后释放，但最终还是因参加谋刺瓦仑士的活动而被处死。

Maximus of Ephesus (Greek: Μάξιμος ὁ Ἐφέσιος; c. 310 – 372 AD) was a Neoplatonist philosopher. He is said to have come from a rich family, and exercised great influence over the emperor Julian, who was commended to him by Aedesius. He pandered to the emperor's love of magic and theurgy, and by judicious administration of the omens won a high position at court. His overbearing manner made him numerous enemies, and, after being imprisoned after the death of Julian, he was put to death by Valens.