Nikolai Mariusovich Radin (Russian: Николай Мариусович Радин; 15 December 1872 – 24 August 1935) was a Russian stage and silent film actor and director.

Nikolai was a grandson of the famous choreographer Marius Petipa.

Radin received his education at Faculty of Law, Saint Petersburg State University in 1900.

For many years, he and his second wife, actress Yelena Shatrova, worked as actors at the theater Korsch in Moscow.

In 1932 the theater Korsch was closed, and they began working at the Maly Theatre.