Koordinat: 1°12′54″N 103°47′12″E / 1.21500°N 103.78667°E / 1.21500; 103.78667

Pulau Jong atau Junk Island ialah pulau kon seluas 6,000 m² yang terletak 6 kilometer di barat daya Singapura. Pulau kecil ini terletak utara Pulau Sebarok dan Pulau Sakeng (kini bergabung dengan Pulau Semakau).

According to a local legend behind the island's name, a Chinese junk was attacked by Malay pirates one night where the island now is. Just as the pirates were about to board the junk, the captain (the Nakhodah) awoke. When the captain saw the pirates, he uttered such a frightful yell that the sea spirit turned the whole junk into an island.

• Victor R Savage, Brenda S A Yeoh (2004), Toponymics - A Study of Singapore Street Names, Eastern University Press, ISBN 981-210-364-3

• Coral reefs of Singapore - Pulau Jong Diarkibkan 2006-12-07 di Wayback Machine
• Photos of marine life on Pulau Jong from wildsingapore