Kiên Giang Province
Thổ Chu Island ( or "đảo Thổ Châu") is the largest island of Thổ Chu Islands in the Gulf of Thailand. Here lies the administrative center of Thổ Châu Commune, Phú Quốc District, Kiên Giang Province, Vietnam. In the West, the island is also known as "Poulo Panjang or Pulo Panjang."