As of 2025, the population of Tanzania is approximately 70.55 million people (70 545 865), making it the 21st most populous country in the dataset of 217 countries, with a 0.86% share of the combined total.
Over the past five years the population of Tanzania changed by +15.70%, and over the past ten years by +35.61%. By five-year growth, Tanzania ranks 13th of 217 countries; in terms of momentum, growth is slowing — from +3.23% to +2.96% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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