Getting to know more about where the pearl Phu Quoc Island is located will help your trip here become easier and more convenient. Geographical location Where is Phu Quoc island on the map? Phu Quoc of the Southwest is an island separated from the mainland and also the largest island in Vietnam with an area of up to 574 square kilometers. The island also belongs to the Gulf of Thailand. Phu Quoc Island is located quite close to Cambodia which is just 14 nautical miles from the coast ...