The Castilla y León Symphony Orchestra (Orquesta Sinfónica de Castilla y León, OSCyL for ahort) is a Spanish symphony orchestra from Valladolid created in 1991 following the disappearance of the Orquesta Ciudad de Valladolid. It is based in the Auditorio Miguel Delibes. British conductor Andrew Gourlay assumed the position as Chief Conductor in 2016. Jesús López Cobos is their Director Emeritus; Jaime Martin serves as principal guest conductor.