Sir Alfred Herbert Brewer (21 June 1865 – 1 March 1928) was an English composer and organist.

As organist of Gloucester Cathedral from 1896 until his death, he contributed a good deal to the Three Choirs Festival for 30 years.

He was educated at the Cathedral School, Oxford and was the first organ scholar at the Royal College of Music.

[3] Although his professional career was spent in the provinces, his three decades of involvement in planning and organising the Three Choirs Festival brought him into contact with a wide range of composers and other artistic figures both from Britain and the continent, including Robert Bridges, Edward Elgar, Glazunov, H Rider Haggard, Hubert Parry, Arthur Quiller-Couch, Ravel, Saint-Saëns and Sibelius.

In 1913 Brewer was entrusted with conducting the premiere of Sibelius's tone-poem for soprano and orchestra, Luonnotar, Op.