Prince Pyotr Vasilyevich Lopukhin (1753, Saint Petersburg – 1827) was a Russian politician and member of the Lopukhin family. He was president of the Council of Ministers from 1816 to 1827.

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Pyotr Lopukhin
Portrait of Lopukhin by Stepan Shchukin
Alma mater	Imperial Moscow University (1761)

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He married twice:

1. Praskovia Ivanovna, née Levshina (1760—1785). Children:
   1. Princess Anna Petrovna Lopukhina (1777—1805), a royal mistress to Emperor Paul of Russia
   2. Vasily Petrovich (1780—?)
   3. Yekaterina Petrovna Lopukhina (Demidova) (11 April 1783 — 21 July 1830), wife of Grigory Alexandrovich Demidov
   4. Praskovya Petrovna Lopukhina (Kutaisova) (1784—1870), a lady-in-waiting, wife of Pavel Kutaisov
2. Ekaterina, née Shetneva (1763–1839). Children:
   1. Alexandra Petrovna Lopukhina (1788—1852)
   2. Pavel Petrovich Lopukhin (1790—1873), a lieutenant general, a member of the Napoleonic Wars, Freemason
   3. Elizaveta Petrovna (179?—1805), died young
   4. Sofya Petrovna Lopukhina (Lobanova-Rostovskay) (1798—1825), wife of Aleksey Yakovlevich Lobanov-Rostovsky, died in childbirth

Educated at home, he was recorded as Life Guards of the Transfiguration Regiment and entered service in 1769.