Doncaster, a town of England, in the West Riding of Yorkshire, 32 m. 8. of York; pop. in 1871, 18,758. It is on the river Don, which is here navigable, and in a cultivated district. Its grain market is the largest in the kingdom, and it has manufactures of agricultural machines, iron, brass, and linen. But it is chiefly noted for its horse races, established in 1703. The famous St. Leger stakes were founded in 1775. The race course is nearly two miles in length, and one of the finest in the kingdom. The races are held annually in the third week of September, and continue for five days. Don-caster is the Danum mentioned in the itinerary of Antoninus; hence its Saxon name Dona Castre, and its present name. The town was frequently sacked by the Danes. Prior to the reformation, it was the seat of several convents of Carmelites, and white, black, and gray friars. A new parish church, to replace the old one destroyed by fire in 185a, was finished in 1858, at a cost of £52,000. Roman antiquities are frequently found in the city and vicinity.