Seyyed Hossein Nasr (in Persian: سید حسین نصر‎) (born April 7, 1933 in Tehran) is an Iranian University Professor of Islamic studies at George Washington University, and a prominent Islamic philosopher. He is the author of many scholarly books and articles.

Nasr is a Muslim Persian philosopher and renowned scholar of comparative religion, a lifelong student and follower of Frithjof Schuon, and writes in the fields of Islamic esoterism, Sufism, philosophy of science, and metaphysics.

Nasr was the first Muslim to deliver the prestigious Gifford Lectures, and in year 2000, a volume was devoted to him in the Library of Living Philosophers.

Professor Nasr speaks and writes based on the doctrine and the viewpoints of the perennial philosophy on subjects such as philosophy, religion, spirituality, music, art, architecture, science, literature, civilizational dialogues, and the natural environment. He also wrote two books of poetry (namely Poems of the Way and The Pilgrimage of Life and the Wisdom of Rumi), and has been even described as a 'polymath'.