Pyotr Alexandrovich Manteifel (also written as Manteuffel) (Russian: Пётр Александрович Мантейфель; June 30, 1882 – March 24, 1960) was a Soviet zoologist and naturalist.

His father was the writer, musician and civil servant Alexander Petrovich Zoege von Manteuffel who served as a district justice of peace for thirty years.

In 1905, he married Alexandra Yakovlevna née Nikitinskaya (1886 -1961) the daughter of a court official; two years later, they had a son, Boris Manteifel, who became a prominent Soviet biologist.

Manteuffel was a crucial figure behind the formation of the famous KYBZ, or the Circle of Young Biologists of the Zoo, proving himself to be a popular and talented teacher.

The pupils called him Uncle; many future scientists, zoologists and naturalists came out of this youth program, among them Nikolai Kalabukhov, Elena Ilyina, Alexander Kuzyakin, Vera Chaplina, Boris Manteifel, Lev Kaplanov, Sergey Folitarek, the brothers Vladimir Grinberg and Yuri Grinberg, Gordey Bromley, Yuri Isakov, Andrey Bannikov, Valent Kucheruk, Sergey Korytin and others.