Nikolai Efimovich Timkov (Russian: ?????´? ??????´? ???´?????; August 12, 1912, Rostov-on-Don, Russian Empire – December 25, 1993, Saint Petersburg, Russia) was a Soviet Russian painter, Honored Artist of Russian Federation, and a member of the Saint Petersburg Union of Artists (before 1992 the Leningrad branch of Union of Artists of Russian Federation).
He lived and worked in Leningrad and is regarded as one of the leading representatives of the Leningrad School of Painting, worldwide known for his landscape paintings.