The Little White Horse is a low fantasy children's novel by Elizabeth Goudge, first published by the University of London Press in 1946 with illustrations by C. Walter Hodges, and Anne Yvonne Gilbert in 1992. Coward–McCann published a US edition next year. Set in 1842, it features a recently orphaned teenage girl who is sent to the manor house of her cousin and guardian in the West Country of England. The estate, village, and vicinity are shrouded in mystery and magic; the "little white horse" is a unicorn.

Elizabeth de Beauchamp Goudge FRSL was an English writer of fiction and children's books. She won the Carnegie Medal for British children's books in 1946 for The Little White Horse. Goudge was long a popular author in the UK and the US and regained attention decades later. In 1993 her book The Rosemary Tree was plagiarised by Indrani Aikath-Gyaltsen; the "new" novel set in India was warmly reviewed in The New York Times and The Washington Post before its source was discovered. In 2001 or 2002 J. K. Rowling identified The Little White Horse as one of her favourite books and one of few with a direct influence on the Harry Potter series.