The Taittiriya Upanishad (, ) is a Vedic era Sanskrit text, embedded as three chapters (adhyaya) of the Yajurveda. It is a mukhya (primary, principal) Upanishad, and likely composed about 6th century BCE.

The Taittiriya Upanishad is associated with the Taittiriya school of the Yajurveda, attributed to the pupils of sage Vaishampayana. It lists as number 7 in the Muktika