Leonid Anisimovich Tkachenko (Russian: Леони́д Ани́симович Ткаче́нко; born 28 March 1927) was a Soviet, Russian painter, a member of the Saint Petersburg Union of Artists (before 1992 the Leningrad branch of Union of Artists of Russian Federation), living and working in Saint Petersburg, regarded as one of the leading representatives of the "left" wing of the Leningrad school of painting.