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. After being a leading British two-year-old of his generation he became the tenth winner of the Triple Crown in 1903, winning the 2,000 Guineas Stakes the Epsom Derby and the St. Leger Stakes.