Pyotr Dmitrievich Yeropkin (1724, 1805) was a significant Russian military and state figure from the Yeropkin family. He participated in the Seven Years' War and held the position of senator. In 1786 and 1790, he was the commander-in-chief in Moscow.

Pyotr Dmitrievich was born into the family of the Riga vice-governor Dmitry Fyodorovich Yeropkin. In his youth, he was known for his beauty and outstanding physical strength. He began his service in 1736 as an aide-de-camp to his father, who was then the Moscow chief commandant with the rank of major general. In the 1740s, he served as the duty major under the Moscow commander-in-chief V. Ya. Levashov.

Yeropkin participated in the Seven Years' War (1756, 1763) and ended it with the rank of major general. For his victory at Palzig on August 19, 1759, he was awarded the Order of Saint Anna and received 6,000 rubles.

With the ascension of Catherine II to the throne, he was honored with the Order of Saint Alexander Nevsky. In 1765, he voluntarily left military service and became a senator in the 5th department of the Senate.

From 1769 to 1771, Yeropkin headed the Main Salt Office and monitored the health of Moscow residents. During the Plague Riot of 1771, he restored order in the city after the departure of Governor-General Saltykov.

After suppressing the riot, Yeropkin sent a report to the Empress requesting resignation. Catherine II sent him an order of dismissal without a date, allowing him to use it at his discretion. She also rewarded him with 20,000 rubles for his bravery and the Order of Andrew the First-Called. Although the Empress offered him 4,000 souls of peasants, he declined.

In 1773, Yeropkin was promoted to the rank of actual privy councilor, but he was dissatisfied, as he would have preferred to remain a major general. The following year, he retired.

Twelve years later, in 1786, he was appointed commander-in-chief in Moscow with a promotion to general-anshef. His tenure in this position was marked by significant urban development projects and improvements in public order, including an increase in police numbers and the creation of hussar squadrons for patrolling.

After his retirement on February 19, 1790, Yeropkin lived in a mansion on Ostozhenka until his death. He passed away suddenly while playing rocambole and was buried in his estate in the village of Uspenskoe, Kaluga province.