Kornely Nikolayevich Poltavtsev (Russian: Корнелий Николаевич Полтавцев, 1823, Kursk, Imperial Russia, – 10 January 1865, Moscow, Imperial Russia) was a Russian stage actor, associated with Moscow's Maly Theatre.

Three years later he left Moscow and embarked upon a tour through provincial theatres staying for couple of years in each city: Odessa (1845–1846), Kishinev (1846–1847), Taganrog and Rostov-on-Don (1848–1849), Voronezh and Tula (1849–1850), to some critical acclaim.

In 1850 he returned to Moscow and became an overnight success with Nestor Kukolnik's Prince Mikhail Vasilyevich Skopin-Shuysky, where he played Lyapunov, the part previously associated with Pavel Mochalov.

[2][3] Kornely Poltavtsev gave his most memorable performances in plays by William Shakespeare (King Lear, Othello, Coriolanus), Friedrich Schiller (Ferdinand, Intrigue and Love), and Alexander Ostrovsky (Khorkov, The Poor Bride).

Poltavtsev gave his final performance for Maly in 1865 as Dubrovin in Ostrovsky's Voyevoda.