"I Want to Tell You" is a song by the English rock band the Beatles from their 1966 album Revolver. It was written and sung by George Harrison, the band's lead guitarist. After "Taxman" and "Love You To", it was the third Harrison composition recorded for Revolver. Its inclusion on the LP marked the first time that he was allocated more than two songs on a Beatles album, a reflection of his continued growth as a songwriter beside John Lennon and Paul McCartney.

George Harrison was an English musician, singer and songwriter who achieved international fame as the lead guitarist of the Beatles. Sometimes called "the quiet Beatle", Harrison embraced Indian culture and helped broaden the scope of popular music through his incorporation of Indian instrumentation and Hindu-aligned spirituality in the Beatles' work. Although the majority of the band's songs were written by John Lennon and Paul McCartney, most Beatles albums from 1965 onwards contained at least two Harrison compositions. His songs for the group include "Taxman", "Within You Without You", "While My Guitar Gently Weeps", "Here Comes the Sun" and "Something". Harrison's earliest musical influences included George Formby and Django Reinhardt; subsequent influences were Carl Perkins, Chet Atkins and Chuck Berry.