As of 2025, the population of Korea, Rep. is approximately 51.68 million people (51 684 564), making it the 29th most populous country in the dataset of 217 countries, with a 0.63% share of the combined total.
Over the past five years the population of Korea, Rep. changed by -0.29%, and over the past ten years by +1.31%. By five-year growth, Korea, Rep. ranks 180th of 217 countries; in terms of momentum, the decline is accelerating — from +0.32% to -0.06% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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