Nikolai Mikhailovich Yadrintsev (Russian: ??????? ?????????? ????????; October 18, 1842, Omsk – June 7, 1894, Barnaul) was a Siberian public figure, explorer, archaeologist, and turkologist.
His discoveries include the Orkhon script, Genghis Khan's capital, Karakorum and Ordu-Baliq, the capital of the Uyghur Khaganate.
He was also one of the founding figures of Siberian separatism.