Koh Rong is situated about twenty-two kilometres due west of Sihanoukville in the Gulf of Thailand some two to three hours by slow boat or 45 minutes using the new fast ferries depending on the conditions. The island is roughly 14 kilometres long and 8 kilometres at its widest. Most of the development is on the southern peninsula around the main boat pier although there are bungalow operations spread around the island offering differing levels of seclusion. There are scuba diving centres on the island and trips to nearby islands for scuba diving and snorkeling can easily be arranged.

Other activities include jungle-trekking, kayaking as well as fishing tours if lazing on the beach and swimming in the turquoise waters becomes a hardship. The vast majority of the island is still totally undeveloped although plans are in the pipeline to highly commercialize the island in the future including an airport, casino and golf course.