The Jersey Stakes is a Group 3 flat horse race in Great Britain open to three-year-old horses. It is run at Ascot over a distance of 7 furlongs (1,408 metres), and it is scheduled to take place each year in June. The event was established when a three-year cycle of races called the Triennial Stakes was discontinued after World War I. The Triennial Stakes had comprised a race for two-year-olds over 5 furlongs, a race for three-year-olds over 7 furlongs, and a race for four-year-olds over 2 miles. Horses would return each year to compete over the increasing distances.