As of 2025, the population of Thailand is approximately 71.62 million people (71 619 863), making it the 20th most populous country in the dataset of 217 countries, with a 0.87% share of the combined total.
Over the past five years the population of Thailand changed by -0.03%, and over the past ten years by +1.53%. By five-year growth, Thailand ranks 179th of 217 countries; in terms of momentum, the decline is accelerating — from +0.31% to -0.01% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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