Onokhoy (Russian: Онохо́й; Buryat: Нохой, Nokhoi) is an urban locality (an urban-type settlement) in Zaigrayevsky District of the Republic of Buryatia, Russia.

As of the 2010 Census, its population was 10,689.

[2] Within the framework of administrative divisions, the urban-type settlement (inhabited locality) of Onokhoy is, together with two rural localities (the selo of Todogto and the settlement of Nizhniye Taltsy), incorporated within Zaigrayevsky District as Onokhoy Urban-Type Settlement[1] (an administrative division of the district).

[10] As a municipal division, the territories of Onokhoy and Todogto, together with two rural localities in Dabatuysky Somon (the selo of Stary Onokhoy and the ulus of Onokhoy-Shibir), are incorporated within Zaigrayevsky Municipal District as Onokhoy Urban Settlement.

[11] The settlement of Nizhniye Taltsy is municipally incorporated as Taletskoye Rural Settlement in Zaigrayevsky Municipal District.