Oxford Harmonic Choir is a large, mixed-voice amateur choir based in Oxford, England. It is the second-oldest non-collegiate choir in Oxford, having been founded in 1921,[1][2] and according to The New Grove Dictionary of Music and Musicians is one of the "institutions of lasting significance to Oxford's musical life that were established during this period".[2] Currently the choir has around 150 singing members and usually performs three concerts annually in either the Sheldonian Theatre or Oxford Town Hall with the Orchestra of Stowe Opera.