The Cotillion Stakes is an American Thoroughbred horse race held annually at Parx Racing and Casino in Bensalem, Pennsylvania. It is run in late September or early October as a prelude to the annual Breeders' Cup World Thoroughbred Championships. The race is open to three-year-old filles, willing to race one and one-sixteenth miles (eight and a half furlongs) on the dirt. The Grade I event carries a purse of US$1 million.