Koh Tao (Tao Island) is located on the east coast of Surat Thani Province ,45 kilomaters to the northwest of Pha Ngan Island.Its total surface area is 21 square kilometers or approximately 13000 rais. Frpm noth to sount it is 7.5 kilometers long and from east to west it is 4.5 kilometers wide.Allmost all of the island is mountainous.There are two amall island nearly; Nang Yuan Island which measures about 202 rais whis has a sand bar which connects its three islands together,and Gong Sai Dang Islands (Shark Island),a tiny island to the northeast of Koh Tao which has a total area of just 6 rais

Tao Island in the Past
Before 1927 when Thailand was ruled by the People's Party,The Department of Corrections used Koh Tao and KOh Tarutao,which is locates is located on the west coast of thailand in satun Province,as prisons for polictical prioners during the baworagej and the Sergeant Revolutions.Later on this island was registered as Royal Property and it was abandoned for a long time in 1937.More and more people came to settle here and now Koh tao is a Tambon of Pha Ngan Island district ,Surat Thani Province.There are three village o the island ;Hat Sai Ree, Mae Hat and Chalok Ban