Ierissos (Greek: Ιερισσός) is a small town on the east coast of the Akti peninsula in Chalkidiki, Greece. It is located 115 km from Thessaloniki, and 10 km from the border of the Autonomous Monastic State of the Holy Mountain, or Mount Athos. It is the site of Ancient city and former bishopric Hierissus, and as such remains a Latin Catholic titular see. Ferries run from Ierissos to the east coast of Mount Athos.
Since the 2011 local government reform Ierissos has been the seat of the municipality of Aristotelis, and of the municipal unit of Stagira-Akanthos.
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