Margaret Cookhorn is a British classical contrabassoonist and bassoonist. She is Principal Contrabassoon and Bassoon with the City of Birmingham Symphony Orchestra, bassoonist with the Birmingham Contemporary Music Group and, notably, has pursued a career as a contrabassoon soloist. John Woolrich's contrabassoon concerto Falling Down was written for her. She most recently performed the piece at the BBC Proms in 2015.
Cookhorn is a tutor at the Royal Birmingham Conservatoire and for the CBSO Youth Orchestra.