The Golden Triangle (Burmese: ရွှေတြိဂံ နယ်မြေ, IPA: [ʃwè tɹḭɡàɴ nɛ̀mjè]; Thai: สามเหลี่ยมทองคำ, IPA: [sǎːm.lìəm.tʰɔːŋ.kʰam]; Lao: ສາມຫຼ່ຽມທອງຄຳ; Chinese: 金三角; Vietnamese: Tam giác Vàng; Khmer: តំបន់ត្រីកោណមាស, Khmer pronunciation: [tɑmbɑn trəy kaon mieh]) is one of Asia's two main opium-producing areas. It is an area of approximately 950,000 square kilometres (367,000 sq mi) that overlaps the mountains of three countries of Southeast Asia: Myanmar, Laos and Thailand.
Along with Afghanistan in the Golden Crescent, it has been one of the most extensive opium-producing areas of Asia, and of the world, since the 1950s. Most of the world's heroin came from the Golden Triangle until the early 21st century when Afghanistan became the world's largest producer.
The Golden Triangle designates the confluence of the Ruak River and the Mekong River, since the term has been appropriated by the Thai tourist industry to describe the nearby border tripoint of Thailand, Laos and Myanmar.