There are Mountains, about 86 percent of the area along the Phuket mountain range. Plains are about 14 percent of the area,divided into two zones as follows.
1. The high and mountain Area are the east of province. It is a Tanaowasri continuous range, places in a direction from north to south, and Slopes into Andaman Sea which is an important source watershed: Kraburi River and La-auen canal.
2. The coastal plains Area are the west of province. It is a narrow plateau of about 50-20 km, along the coast. Soil fertility was not suitable for agriculture. However, Ranong has many beautiful beaches: Bang Ben Beach and Praphat Beach. There are many islands around 62 islands such as Koh Payam, Koh Chang, Koh Sinhai, Koh Lao, Koh Kangkaw (bat)