Ko Pha-ngan is an island in the Gulf of Thailand in Surat Thani Province of southern Thailand. Ko Pha-ngan has two sister islands: the larger Ko Samui to the south and the smaller Ko Tao to the north.
Estimated perimeter: 40 km
From mainland: about 55 km
From Ko Samui: about 15 km
From Ko Tao: about 35 km
Main town: Thong Sala
Highest Point: Khao Ra, 635 m
