新柏拉图主义（Neo-Platonism），是公元3世纪由亚历山大城的普罗提诺（Plotinus）发展出的哲学派别，是古希腊文化末期最重要的哲学流派，对基督教神学产生了重大影响。

该流派主要基于柏拉图的学说，再加上斯多葛学派、亚里斯多德的思想融合为一个体系。但在许多地方进行了新的诠释。在《新约圣经》时代的哲学本身包含一种宗教态度，这就是基督教涉及哲学的缘故。这种宗教哲学就称新柏拉图主义，也就是以希腊思想为基础而创建的宗教哲学。主义主张所有存在皆来自一源，借此个别灵魂能神秘地重返为一；亦强调存在层级的多重性，只能被感官所感知的物体世界处于最低层级。

Neoplatonism is a modern term used to designate a tradition of philosophy that arose in the 3rd century AD and persisted until shortly after the closing of the Platonic Academy in Athens in AD 529 by Justinian I. Neoplatonists were heavily influenced by Plato, but also by the Platonic tradition that thrived during the six centuries which separated the first of the Neoplatonists from Plato.