The legal drinking age in Thailand is age 20.
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The legal drinking age in Thailand is 20. Applies nationwide, and there are also restricted sale hours and alcohol-free days around elections and some religious holidays.
Yes, especially if you're close to the minimum age of 20 — carry a valid passport, since a foreign driver's license isn't always accepted as proof of age.
Rules can vary between regions/states within a country — this reflects the national or most common standard for Thailand, so check locally if you're near the threshold.
Yes — this is specifically about the minimum legal age, not general alcohol availability or dry regions, which is a separate consideration.