Ole Nydahl (born March 19, 1941), also known as Lama Ole, is a Danish Lama in the Karma Kagyu school of Tibetan Buddhism. Since the early 1970s, Nydahl has toured the world giving lectures and meditation courses. With his wife, Hannah Nydahl (1946-2007), he founded Diamond Way Buddhism, a worldwide Karma Kagyu Buddhist organization of lay practitioners.

Nydahl is the author of ten books in English, including The Way Things Are, Entering the Diamond Way, Buddha and Love and Fearless Death.