| Age | 53 (age at death) |
| Birthday | 30 September, 1842 |
| Birthplace | Gostinovo, Oryol Governorate, Russian Empire |
| Died | 31 March, 1896 |
| Place of Death | Smolensk, Russian Empire |
| Zodiac Sign | Libra |
Pyotr Grigoryievich Zaichnevsky (Russian: Пётр Григорьевич Заичневский; 30 September 1842 – 31 March 1896) was a Russian revolutionary known as one of the main ideologues of Russian Jacobinism.
