Neighbouring provinces are (from north, clockwise) Chumphon, Nakhon Si Thammarat, Krabi, Phang Nga, and Ranong.

Geographically, the centre of the province is the coastal plain of the Tapi River, mostly grassland interspersed with rubber trees and coconut plantations. In the west are the limestone mountains of the Phuket range which are mostly covered with forest. Khao Sok National Park is found there. To the east the hills of the Nakhon Si Thammarat (or Bantat) mountain range start to rise, protected in the Tai Rom Yen National Park. The total forest area is 3,764 km2 (1,453 sq mi) or 28.8 percent of provincial area.[4]

Many islands in the Gulf of Thailand belong to the district, including the tourist islands Ko Samui, Ko Pha Ngan and Ko Tao, as well as the Ko Ang Thong Marine National Park

Surat Thani