Nikolai Dubasov (September 28, 1869, St. Petersburg – April 4, 1935, Leningrad) was a Russian and Soviet pianist and music teacher. He came from the noble Dubasov family, which was entered in the genealogical registers of Tver Province.
Dubasov graduated from the St. Petersburg Conservatory. In 1890, he won first prize at the First Rubinstein Competition. Specialists disagreed about the result, particularly because Ferruccio Busoni also took part; music historian Grigory Kogan considered the victory undeserved, while competition organizer Samuil Maykapar recalled that Dubasov was a stronger competitor in warmth and poetic interpretation.
Because of illness, Dubasov later largely withdrew from concert performance. From 1894 until the end of his life, except for a break from 1917 to 1923, he taught at the St. Petersburg Conservatory, later renamed the Petrograd and Leningrad Conservatories; he became a professor in 1902. His students included pianists Anatoly Drozdov and Vladimir Zelensky, conductor Ilya Musin, and composer Oskar Strok.
Dubasov also taught at the Saratov Conservatory from 1918 to 1920 and at the Vitebsk People's Conservatory from 1920 to 1922, where he served as dean of the keyboard instruments faculty. His students there included Sofia Orman and Abram Rappoport, who moved with him to Petrograd in 1922 and entered the final year of the Petrograd Conservatory. He was named an Honored Artist of the RSFSR in 1923.