Thomas Greatorex (1814–1858) was an English composer and organist, primarily known for his contributions to sacred music and hymnody. His work is predominantly classified within the genres of classical and church music. Greatorex is most noted for his hymn tunes, particularly "St. George," which remains popular in hymnals today. Greatorex served as the organist at various churches, including St. John's Church in Manchester, and was a prominent figure in the development of English hymnody during the 19th century. His compositions often reflected the Romantic style, characterized by expressive melodies and a focus on lyrical beauty. One of his significant contributions is the arrangement of hymns and the publication of collections that helped to standardize and popularize hymn singing in congregations. His work has influenced later hymn writers and composers, contributing to the rich tradition of English hymnody. Though not as widely recognized as some of his contemporaries, his impact on church music remains evident, with many of his tunes still being sung in churches today, ensuring his legacy within the context of religious music.