Ralph Allwood (born 30 April 1950) is a British choral conductor, composer and teacher, who currently holds the appointment of Fellow Commoner advising in Music at Queens' College, Cambridge. He was previously the Precentor and Director of Music at Eton College between 1985 and 2011. He had previously headed the music departments at Pangbourne and Uppingham.

During his time at Uppingham, he established choral courses, now known as Rodolfus Choral Courses, but formerly known as Uppingham Choral Courses and most recently Eton Choral Courses, of which there are now seven a year. He also conducts the Rodolfus Choir, a critically acclaimed group of singers aged 16–25, drawn principally from these Choral Courses.

Allwood is also the conductor of Inner Voices, a youth chamber choir based in London. Set up in 2011, the choir brings together great singers from a group of London state schools to sing music from across the genre boundaries under the direction of Allwood.