| Name | Born | Talent | Age of first composition | Notes |
| Kit Armstrong | 1992 | Piano | 5 | Composed seriously from the age of 6. First symphony at age 10. |
| Juan Crisóstomo Arriaga | 1806 | Composer | 9 | Wrote opera Los esclavos felices at age 14 and over 100 works before he died at age 19. Was praised as a student of Cherubini. |
| Samuel Barber | 1910 | Composer, conductor | 7 | Attempted an opera at age ten; attended the Curtis Institute of Music at age fourteen |
| Ferruccio Busoni | 1866 | Pianist, composer, conductor, editor, writer, and educator | 7 | Started composing prolifically at age 7. Composed his Concerto for Piano and String Quartet at age 11. |
| Frédéric Chopin | 1810 | Composer | 7 | Began concerts and polonaises at age seven; attained notability by age fifteen |
| Pio Cianchettini | 1799 | Composer, pianist | 6 | Composed prolifically for the piano, performing a concerto of own composition in London in 1809 when he was 10. Edited Beethoven’s works for British publishers. |
| Max Darewski | 1894 | Composer, pianist, conductor | 5 | Composed the waltz Le Rêve, aged 5. Conducted the massed bands numbering five thousand at Crystal Palace, aged 9. |
| Alma Deutscher | 2005 | Composer, pianist, violinist | 5 | Composed first piano sonata at age six, first violin concerto at age nine, and first full-length opera, Cinderella, at age ten. |
| George Enescu | 1881 | Composer | 5 | First compositions around age 5 and wrote large scale work, including four study symphonies in his youth. |
| Morton Gould | 1913 | Composer, conductor, pianist | 6 | |
| Jay Greenberg | 1991 | Composer | 6 | Entered the Juilliard school's pre-college at age 10; first symphony at age 11 |
| Evgeny Kissin | 1971 | Pianist, composer | 6 | Started composing significant output at age 7 including early work, Petrushka. |
| Erich Wolfgang Korngold | 1897 | Composer, conductor | 7 | Started composing at age 7. Wrote cantata and first ballet, ‘Der Schneemann’ at age 11. Piano sonata no.2 played by Artur Schnabel at 13; opera at 17. |
| Franz Liszt | 1811 | Composer, pianist, conductor, teacher | 9 | Was the only child composer to write for a set of Diabelli variations at age 11, and composed opera, Don Sanche, at age 13. |
| André Mathieu | 1929 | Composer, pianist | 4 | Wrote etudes and other works at age 4; piano concertino at age 7 performed with orchestra. |
| Felix Mendelssohn | 1809 | Composer, conductor | 11 | Composed 13 string symphonies from ages 12–14 and opera in his preteens. Also composed masterpieces like his A Midsummer Night’s Dream Overture and Octet in his later teens. |
| Gian Carlo Menotti | 1911 | Composer, librettist, playwright, director | 7 | Started composing at 7; composed first opera at age eleven |
| Wolfgang Amadeus Mozart | 1756 | Composer | 4 | Wrote 25 symphonies, 8-9 operas and various concerti, vocal, and solo work before adulthood. At age 4 his first compositions were Andante (K. 1a) and Allegro. (K. 1b) |
| Émile Naoumoff | 1962 | Pianist, composer | 6 | Began studying with Nadia Boulanger in Paris at the age of 8. His first piano concerto was conducted under Yehudi Menuhin with the composer at the piano when he was aged 10. |
| Dika Newlin | 1923 | Composer | 8 | At the age of 8, she wrote a symphonic piece, Cradle Song, that was added to the repertoire of Cincinnati orchestra conductor Vladimir Bakaleinikoff and performed three years later by the Cincinnati Symphony Orchestra. |
| Frederick Ouseley | 1825 | Composer, organist, musicologist and priest | 3 | Wrote first composition age the age of 3 years and 3 months, possibly the youngest to ever compose a cohesive musical work. Wrote 2 operas by age 8, including L'Isola disabitata. Composed nearly 300 pieces by age 16. |
| Alex Prior | 1992 | Composer, conductor | 8 | By his early teens had written symphonies, concertos, two ballets, two operas, and a requiem for the children of Beslan. |
| Sergei Prokofiev | 1891 | Composer, pianist, and conductor | 5 | Composed first piano piece at age 5. First operetta, The Giant, composed at age 9 along with several other short operas. |
| Sergei Rachmaninoff | 1873 | Composer, pianist | 11 | First pieces from age 11+ show remarkable craft; Piano Concerto No.1, composed from age 17-18. |
| Nino Rota | 1911 | Composer | 8 | First piano composition at age eight; attended Milan Conservatory at age 13; first oratorio performed publicly at age eleven and composed opera, Il Principe Porcaro, at age 13 |
| Camille Saint-Saëns | 1835 | Composer, organist, conductor, and pianist | 3 | Wrote first pieces at age 3. |
| Clara Schumann | 1819 | Pianist, composer, piano teacher | | Composed Four Polonaises at age 10, piano sonata at age 13, and premiered her Piano Concerto. |
| Julian Scriabin | 1908 | | | Composed 4 preludes in the style of his father before he died at the age of 11. |
| Richard Strauss | 1864 | Composer, conductor | 6 | Composed his first song Weihnachtslied aged 6. Composed Winterreise and other songs aged 7. His first orchestral composition, an overture to the singspiel Hochlands Treue was composed in 1872/73. |
| Blind Tom Wiggins | 1849 | Composer, pianist | 4 | Composed music from the age 4-5 including pieces like ‘The Rainstorm’ He and was able to memorize entire speeches with nuances. |