Haad Rin is a peninsular beach area and town on the south-eastern tip of Ko Pha Ngan, an island in the Gulf of Thailand. Its two main beaches are Sunset Beach (Haad Rin Nai) to the south and the larger with 1 1/2 kilometers cresant shaped Sunrise Beach (Haad Rin Nok) to the north. The famous Full Moon Party takes place on Sunrise Beach each month.

The town and beach first became popular with backpackers escaping the tourist influx to Koh Samui in the 1980s. As the popularity of the beach and Full Moon Party have increased, the town has grown to accommodate the new visitors. The town is centred around Chicken Corner, a crossroads and popular meeting spot.