Doctor John Dolittle is the central character of a series of children's books by Hugh Lofting starting with the 1920 The Story of Doctor Dolittle. He is a physician who shuns human patients in favour of animals, with whom he can speak in their own languages. He later becomes a naturalist, using his abilities to speak with animals to better understand nature and the history of the world.

Hugh John Lofting was an English American writer, trained as a civil engineer, who created the classic children's literature character Doctor Dolittle. The fictional physician to talking animals, based in an English village, first appeared in illustrated letters to his children which Lofting sent from British Army trenches in the First World War. Lofting settled in the United States soon after the war and before his first book was published.