As of 2025, the population of Mauritania is approximately 5.32 million people (5 315 065), making it the 125th most populous country in the dataset of 217 countries, with a 0.07% share of the combined total.
Over the past five years the population of Mauritania changed by +15.54%, and over the past ten years by +34.02%. By five-year growth, Mauritania ranks 16th of 217 countries; in terms of momentum, growth is slowing — from +3.01% to +2.93% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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