Prince Nikolai Petrovich Demidov-Lopukhin (Russian: Никола́й Петро́вич Лопухи́н-Деми́дов; 27 April 1836, Saint Petersburg – 18 December 1910, Korsun-Shevchenkivskyi) was a Russian nobleman and general.
The eldest son of Pyotr Grigoryevich Demidov (1807–1862) and his wife Elizaveta Nikolaevna Bezobrazova, Nikolai was a godson of Nicholas I of Russia.
He joined a guards cavalry regiment in 1853, and on 20 November 1854 was promoted to Sub-Lieutenant.
[citation needed] He married Olga Valerianovna Stolypina (1841–1926), the couple had four children that reached adulthood : Son general Alexandr Nikolajevitch Demidoff, 2nd Prince Lopukhin-Demidov, married in 1904 Natalia Dmitrievna Naryshkina (1886–1957), daughter of Dimitri Konstantinovich Naryshkin (1853-1918) and Countess Helene von Toll (1855-1931).
[2] They moved with their family to Finland after the Russian 1917 revolution.