Prince Nikolai Ivanovitch Sviatopolk-Mirskii (, , 1833–1898) was a Russian cavalry general and politician. In 1895 he purchased the famed Mir Castle Complex, repaired and rebuilt it. Nikolai was born to the family of Thomas Bogumile Jean Sviatopolk-Mirskii, the ambassador of the semi-independent Kingdom of Poland to Russia. Nikolai's patronymic Ivanovich was based on a Russified form of the third name of his father. Despite being a descendant of Polish szlachta he was brought up in Saint Petersburg and considered himself Russian.