The legal drinking age in Thailand is 20 years old. You also have to be 20 to buy alcohol in Thailand. It's a common misconception that it's lower, given the relaxed beach vibes and the easy-going atmosphere. And if we're being honest, a lot of underage travelers drink in Thailand.
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In Thailand, you have to be 20 years old to legally buy alcohol. This may surprise some readers, as many teenage tourists drink alcohol while partying in Thailand. No matter what other tourists tell you about the leniency regarding underage tourists and alcohol, the Thai law is the Thai law.