Mykola Hryhorovych Hrynko (; 22 May 1920 – 10 April 1989) was a Soviet Ukrainian actor.
Nikolai Grinko was born on 22 May 1920 in Kherson, then in Ukrainian SSR (now Ukraine). He died on 10 April 1989 in Kiev, in present-day Ukraine.
His wife was Ayshe Rafetovna Chulak-ogly (born 1932), a violinist of the State Radio and Television Symphony Orchestra of the Ukrainian SSR, a jazz-symphonic ensemble Dnepr.
In 1961, Mykola Hrynko switched to cinema. But at his "native" Dovzhenko Film Studio, he was not considered a "native" actor, he was filmed very little, and was not offered any leading roles. His screenplay for Ivan Franko's Stolen Happiness had been lying in the studio offices for 6 years and was put on the shelf.
Grinko is well known for his roles in the films of Andrei Tarkovsky, including: Ivan's Childhood, Andrei Rublev, Solaris, Mirror, and Stalker.
He also starred in the 1981 film Teheran 43.