Ilona Kabos (7 December 1893 – 27 May 1973) was a Hungarian-British pianist and teacher.
Ilona Kabos was born in Budapest in 1893 (some sources give her year of birth as 1894, 1898 or 1902). She studied at the Franz Liszt Academy of Music under Arpad Szendy (a pupil of Franz Liszt), Leo Weiner and Zoltán Kodály, and in 1915 she won the Liszt Prize. In the early part of her career, she played for Ferruccio Busoni, who also played for her. She toured widely, giving a number of premiere performances of works by such composers as Kodály, Weiner, Béla Bartók, Luigi Dallapiccola, Roy Harris, Carlos Chávez and Mátyás Seiber. She premiered Robert Crawford's Six Bagatelles, Op. 3 (1948).
She taught at the Royal Budapest Academy of Music from 1930 through 1936. She made her American debut in 1951.
Ilona Kabos was married to her fellow Hungarian pianist Louis Kentner, and they made their home in London. She was distressed when he left her for Griselda Gould (daughter of the British pianist Evelyn Suart, and the sister of the ballerina Diana Gould, who was Yehudi Menuhin's second wife). It is claimed that her pianism was superior to that of Kentner's.