Ko Sichang (or Koh Sichang Thai: เà¸à¸²à¸°à¸ªà¸µà¸Šà¸±à¸‡ ) is a district (amphoe) of the province Chonburi, Thailand. It consists of the island of Ko Sichang and its adjoining islands. Ko Sichang is located in the Gulf of Thailand, 12 km away from the western shore of Si Racha district.