​YAMBOLI, a town of Bulgaria, on the river Tunja, 49 m W. of Burgas by rail. Pop. (1906) 15,708. It has a large agricultural trade, being situated in the centre of one of the chief corn districts. In the town are the remains of old fortifications, and the ruins of a fine mosque. The bezetlan, or old market-house, is entire, but is now used as a military magazine. An ancient Macedonian town lay some 4 m. N., but Yamboli is first mentioned in the 11th century, when it was known by the Byzantines as Dampolis or Hyampolis.