Musidora (1946–c. 1968) was an Irish-bred British-trained Thoroughbred racehorse and broodmare, best known for winning two Classics in 1949. The filly won four times from twelve races in a racing career which lasted from 1948 until September 1949. After winning once as a two-year-old she won her first three races as a three-year-old including the 1000 Guineas over one mile at Newmarket and at The Oaks over one and a half miles at Epsom Downs Racecourse a month later. In the latter race she narrowly defeated the French filly Coronation, who went on to win the Prix de l'Arc de Triomphe. She finished unplaced in her three subsequent races and was retired to stud, where she had limited success as a broodmare.