Caerwent (20 February 1985 – after 2000) was an Irish Thoroughbred racehorse and sire. Despite contesting only two races as a juvenile he was rated the best horse of his generation after a five-length win in the Group 1 National Stakes. In the following spring he maintained his unbeaten record with a victory in the Harp Lager 2000 Guineas Trial but was narrowly beaten by his stablemate Prince of Birds in the Irish 2000 Guineas. He went on to win the Irish International Stakes and was placed in the St James's Palace Stakes, Vernons Sprint Cup and Prix de l'Abbaye. He was retired to stud at the end of his second but made little impact as a breeding stallion.