John Keats (31 October 1795 – 23 February 1821) was an English Romantic poet. He was one of the main figures of the second generation of Romantic poets along with Lord Byron and Percy Bysshe Shelley, despite his work having been in publication for only four years before his death.

Although his poems were not generally well received by critics during his life, his reputation grew after his death, so that by the end of the 19th century he had become one of the most beloved of all English poets. He had a significant influence on a diverse range of poets and writers. Jorge Luis Borges stated that his first encounter with Keats was the most significant literary experience of his life.

The poetry of Keats is characterised by sensual imagery, most notably in the series of odes. Today his poems and letters are some of the most popular and most analysed in English literature.