As of 2025, the population of Bulgaria is approximately 6.43 million people (6 433 302), making it the 111th most populous country in the dataset of 217 countries, with a 0.08% share of the combined total.
Over the past five years the population of Bulgaria changed by -1.79%, and over the past ten years by -7.89%. By five-year growth, Bulgaria ranks 193rd of 217 countries; in terms of momentum, the decline is slowing — from -1.27% to -0.36% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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