Newmarket, a market town of England. consisting mainly of one long street, wide and well lighted, the N. side of which is in Suffolk and the S. side in Cambridgeshire, 13 m. E. by N. of Cambridge, and 56 m. X. E. of London, with which it is connected by the Eastern Counties railway; pop. in 1871,4,534. It con-tains a corn market, assembly rooms, a handsome church, several schools, and a jockey club. There are 15 establishments for training horses, which is the principal business of the place. It derives its chief importance from the races, seven of which are held annually, viz.: the Craven and the first and second spring meetings, in April and May, at fortnightly intervals; the July; and the first and second October meetings and the Houghton, in October, a fortnight apart. The race course, considered the best in Great Britain, is about 3 m. from the town, and between 4 and 5 m. in circuit. There is also a training ground about 1½ long. In the principal church is a monument to Frampton, who was trainer to Queen Anne and to George I. and II. Near Newmarket is Chippendale park, with fine pleasure grounds.

An old Roman intrench-ment, known as the Devil's ditch, runs in a straight line directly across the heath upon which the race course is situated.