Ranong consist of mountains and sea. 86 per cent of the mountain area. On a mountain range, and there are plain, approximately 14 per cent of the western areas, areas of the province, as the area was a mess, which is narrow flat plain of 5-20 km coastal area and found the two rivers area waters also have islands approximately 62.such Koh phayam Island, Koh Chang Koh Ngai 19,806 Koh Lao Ko bat etc.