The Chikoy (Russian: Чикой; Mongolian: Цѳх гол, Tsökh gol; Buryat: Сүхэ гол, Sükhe gol) is a river in Zabaykalsky Krai and the Buryat Republic in Russia, which partially flows along the Russia-Mongolia border. It is a right tributary of the Selenga. The length of the Chikoy is 769 kilometres. The area of its basin is 46,200 square kilometres.
