George Henry Verrall (7 February 1848 – 16 September 1911) was a British horse racing official, entomologist, botanist and Conservative politician.
Verrall was born in Lewes, Sussex. Following education at Lewes Grammar School he became secretary to his elder brother, John Frederick Verrall. John Verrall was a horse-racing official, being clerk of the course at many of the country's biggest meetings. When John died in 1877, George succeeded him. He moved to Newmarket, Suffolk, the centre of the horse-breeding industry, in 1878.
Verrall had a keen interest in natural history, particularly entomology. He joined the Entomological Society in 1866, was honorary secretary from 1872–1874 and president from 1899 - 1900.
Verrall was one of the most influential British dipterists and worked extensively on several families with his nephew James Edward Collin, (1876–1968). Verrall purchased the collections of several European dipterists: Ferdinand Kowarz (1838–1914), which contained many types of Hermann Loew (1807–1878); Jacques-Marie-Frangile Bigot and Justin Pierre Marie Macquart (1778–1855). These, together with the flies (Between them Verrall and Collin described some 900 species of Diptera) collected by Collin and Verrall himself are in the Hope Entomological Collections at the University of Oxford. He published two books on the subject: