"El Barrio" is a Latin-inflected jazz composition by Joe Henderson, first recorded on November 30, 1964, for his album Inner Urge on Blue Note Records with McCoy Tyner on piano, Bob Cranshaw on bass, and Elvin Jones on drums. The piece is built on a simple but evocative two-chord vamp in B Phrygian mode, alternating between B minor and C major 7, over which Henderson improvised the melody during the recording session itself. According to Nat Hentoff's liner notes, Henderson drew on impressions from his childhood in Lima, Ohio, instructing his bandmates to play the progression "with a Spanish feeling" while he crafted the theme in real time. The result is a brooding, hypnotic composition with a dense, modal character that evokes a Spanish musical ethos through the natural tension of the Phrygian mode. Rather than following a conventional song form with distinct sections and chord changes, El Barrio rides its repeating vamp as a platform for extended improvisation, creating a trance-like quality that recalls the modal explorations of early 1960s jazz while channeling Henderson's own distinctively warm, slightly rough-edged tenor saxophone voice. The tune remains a deep cut in Henderson's catalog rather than a widely covered standard, but it is valued by listeners and musicians for its atmospheric intensity and the window it provides into Henderson's adventurous compositional process.