Deylam (Dailam or Bandar-e Deylam) is located to the north of BUSHEHR province and near the coast of Persian Gulf. Its center is the historical city of Daylam. Evidence of two ancient ports in this area, such as Mahruban located 24 km. north of Daylam and 'Bandar-e-Si' 20 km. from Daylam throw light on the ancient and historical past of this vicinity, which intermingles with that of 'Bandar-e-Genaveh'.