Jane Marian Joseph (31 May 1894 – 9 March 1929) was an English composer, arranger and music teacher. She was a pupil and later associate of the composer Gustav Holst, and was instrumental in the organisation and management of various of the music festivals which Holst sponsored. Many of her works were composed for performance at these festivals and similar occasions. Her early death at age 35, which prevented the full realisation of her talents, was considered by her contemporaries as a considerable loss to English music.