Atharvan (Sanskrit: अथर्वन् IAST: Atharvan, nominative singular: अथर्वा IAST: Atharvā) is a legendary Vedic sage (rishi) of Hinduism, who along with Angiras, is supposed to have authored ("heard") the Atharvaveda.

Atharvan married Shanti, daughter of Prajapati Kardama, and had a great sage Dadhichi as a son.

According to the Mundaka Upanishad and other texts, he was the eldest son and (Manasaputra) born from mind of the creator deity, Brahma.

Vedic atharvan is cognate with Avestan āθrauuan / aθaurun, "priest", but the etymology of the term is not yet conclusively established.

It has been suggested by scholars that the Vedic and Avestan terms are not of Indo-European origin, and are derived from the BMAC substrate.