Surat Thani (, ) is a city in Amphoe Mueang Surat Thani, Surat Thani Province, southern Thailand. It lies 651 km south of Bangkok. It is the capital of Surat Thani Province. The city has a population of 132,040 (2019), and an area of 68.97 km2. The city's population density is 1,914 inhabitants per km².

Surat Thani is located near the mouth of