Sir (Herbert) Hamilton Harty (4 December 1879 – 19 February 1941) was an Irish composer, conductor, pianist and organist.

After an early career as a church organist in his native Ireland, Harty moved to London at about age 20, soon becoming a well-known piano accompanist. The Musical Times called him "the prince of accompanists". As a composer he wrote throughout his career, many of his works being well received, though few are regularly performed in the 21st century.