Ust-Maysky Ulus (Russian: Усть-Майский улус; Sakha: Уус-Маайа улууһа) is an ulus (district) of the Sakha Republic, Russia. The ulus is administratively divided into five naslegs, and has jurisdiction over six settlements (Allakh-Yun, Eldikan, Solnechny, Ust-Maya, Yugoryonok, and Zvyozdochka).