Three new species of the genus Thymus L. are described from the Eastern Europe, East Siberia and the Russian Far East: T. × goginae Vasjukov, nothosp. nova (Vladimir Region), T. lenensis Vasjukov, sp. nova (Republic of Yakutia) and T. probatovae Vasjukov, sp. nova (Magadan Region); a key for determination of the species of the European Russia forest zone is given.