Siyouma (foaled 3 April 2008) is an Irish-bred, French-trained Thoroughbred racehorse and broodmare. Bred and originally owned by the Aga Khan she was unraced as a two-year-old and won one minor race as a three-year-old in 2011 before being sold at auction. In 2012 she emerged as a top-class racemare, winning the Sun Chariot Stakes in England and the E P Taylor Stakes in Canada as well as finishing third in the Falmouth Stakes and fourth in the Prix Jean Romanet. After her retirement from racing she was sold and exported to Japan.