Aruneya Upanishad is a minor Upanishad in the corpus of the 108 Upanishads of Hinduism. It is written in Sanskrit. It is one of the 16 Upanishads attached to the Samaveda. It is classified as a Sannyasa Upanishad.

The Upanishads are late Vedic and post-Vedic Sanskrit texts that "document the transition from the archaic ritualism of the Veda into new religious ideas and institutions" and the emergence of the central religious concepts of Hinduism. They are the most recent addition to the Vedas, the oldest scriptures of Hinduism, and deal with meditation, philosophy, consciousness, and ontological knowledge. Earlier parts of the Vedas dealt with mantras, benedictions, rituals, ceremonies, and sacrifices.