Ko Pha Ngan (or Koh Phangan, Thai: เกาะพะงัน, RTGS: Ko Pha-ngan, ) is an island in the Gulf of Thailand in South East Thailand, and located in Surat Thani Province. It is famous for its full moon party at Haad Rin Beach and as a backpackers destination. Ko Pha Ngan has two sister islands: the larger Ko Samui to the south and the smaller Ko Tao to the north.
- Estimated perimeter: 50 km EST. (10hrs average walking time)
- 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, 630m asl.
Read more about Ko Pha Ngan: History, Facilities, Administration, Popular Culture