Caleb Simper (12 September 1856 – 28 August 1942) was an English composer and church organist. He gained fame for his prolific output of choral cantatas, anthems and organ works, which were widely performed and sold in their millions. His straightforward, sometimes simplistic and over sentimental style was written with amateur performance in mind, and can be compared to that of his close contemporary, John Henry Maunder.