Allakh-Yun ( ; ) is an urban locality (an urban-type settlement) in Ust-Maysky District of the Sakha Republic, Russia, located 306 kilometers from Ust-Maya, the administrative center of the district, Registry of the Administrative-Territorial Divisions of the Sakha Republic in the Yudoma-Maya Highlands on the right bank of the Allakh-Yun River, after which it was named.