Ivan Vladimirovich Lopukhin (Russian: Ива́н Влади́мирович Лопухи́н) (February 24, 1756, Oryol Governorate–June 22, 1816, Oryol Governorate) was an Imperial Russian philosopher, mystic, writer and humanitarian. In 1801, Tsar Alexander I asked Lopukhin to investigate complaints by the Doukhobors, his reports in 1802 leading to their resettlement on the Molochnaya River, along with other religious minorities.