Tanzania population
Tanzania: 70.5 million people in 2025 (70,545,865), 21st of 217 countries and areas — and 130 million projected for 2050.
Compare Tanzania with another country
Where it stands
In 2025 Tanzania has 70,545,865 people, which is 0.86% of the 8.19 billion counted across the 217 countries and areas on this site. That puts it 21st by population, behind Thailand and ahead of United Kingdom.
Since 1960
In 1960 the figure was 9,901,419. Since then the population has grown 7.12×, an average of 3.07% a year upward. It doubled at some point along the way — the year it first reached 19,802,838 was 1982.
The projection keeps rising to the end of the data: 129,621,102 in 2050, 83.7% above 2025. The highest figure on this page is that last one, so no peak has been reached yet.
The ranking in 2050
In 2050 the projected rank is 15th, up 6 places from 21st. Rankings move when other countries grow faster or slower, not only when Tanzania changes.
People and land
Tanzania covers 885,800 km² of land, so 2025 density is 80 people per km² — 124th most crowded of 216 places with an area figure. At that density a square 10 km on a side holds about 7,964 people.
The fertility rate was 4.54 births per woman in 2024, well above replacement level; life expectancy at birth was 67.2 years (2024); 42.3% of people were under 15 and 3% were 65 or older (2025); 37% of the population lived in cities. These shape the curve above: a young population keeps growing after fertility falls, an old one starts shrinking sooner.
Its nearest neighbours in the ranking are Thailand just above, with 71.6 million (1.02× as many), and United Kingdom just below, with 69.5 million (1.02× as many as the United Kingdom has).
How the numbers are taken. Total population from the World Bank's population estimates and projections (built from United Nations and national statistics). Values to 2025 are estimates; 2026–2050 are projections that continue current fertility, mortality and migration trends. Sources and limits.