Rock Sand (1900–1914) was a British Thoroughbred race horse and sire. In a career which lasted from the spring of 1902 until October 1904 he ran twenty times and won sixteen races. He was a leading British two-year-old of his generation, winning the 2,000 Guineas Stakes The Derby and the St. Leger Stakes. He won another series of major races as a four-year-old before being retired to stud, where he had success in both Europe and North America.