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Compare · UN World Population Prospects 2024
Tanzania and 
Vietnam, side by side
In 2026, half of the people in Tanzania are older than 19. In Vietnam, half are older than 35.
UN estimates for mid-2023: Tanzania 66,617,606 people · Vietnam 100,352,192
How to read this: each pyramid stacks a place’s people by age — babies at the bottom, the oldest at the top, men on the left and women on the right. A wide bottom means many children; a wide top means many older people.
Each bar is a share of its own place’s people, so a small country and a large one can be read side by side.
men women projected
TZA × VNM · 2026 · age groups
If each place were 100 people
Shrink each population to 100 people and count them. Dots are children under 15, filled squares are people aged 15 to 64, and open squares are people 65 and over. The picture follows the year slider above.
- Children, under 15
- 42
- Aged 15 to 64
- 55
- Aged 65 and over
- 3
- Children, under 15
- 22
- Aged 15 to 64
- 68
- Aged 65 and over
- 10
TZA × VNM · families and lifetimes
Children, and how long lives last
Tanzania is at about 4.4 children for each woman, at this year's rates; Vietnam is at about 1.9. Around 2.1 children per woman keeps a population the same size over time, leaving migration aside. Life expectancy at birth this year: about 68 years in Tanzania, about 75 in Vietnam.
Children per woman, 2026
Each figure is one child: how many children a woman would have in her lifetime at that year’s rates.
The dashed line at 2.1 is about what it takes for each generation to replace the one before it, leaving migration aside.
How long a newborn can expect to live, 2026
Each block is ten years of life, if the death rates of that year stayed the same all life long.
Hatched marks are UN projections (medium variant), not measurements.
TZA × VNM · 1950–2100 · how many
How big, and where they are heading
Vietnam is the larger of the two, with about 40% more people than Tanzania: 102 million to 72.6 million.
Since 1950 the two have moved differently: Tanzania's population is 9.5 times what it was in 1950, while Vietnam's population is 4.1 times what it was in 1950.
Tanzania's population is still growing in 2100; Vietnam's population is expected to peak in 2049. The UN expects Tanzania to have more people than Vietnam from 2043. In 2100: 263 million in Tanzania, 91.7 million in Vietnam (UN projection, medium).
Show the numbers
| Year | Tanzania: people | Vietnam: people | Tanzania: half older than | Vietnam: half older than | Tanzania: children per woman | Vietnam: children per woman | Tanzania: life expectancy | Vietnam: life expectancy |
|---|---|---|---|---|---|---|---|---|
| 1950 | 7.62516 million | 25.1007 million | 17.0 | 24.1 | 6.18 | 5.15 | 41.0 | 48.0 |
| 1960 | 9.90142 million | 32.5319 million | 17.3 | 21.2 | 6.54 | 6.27 | 42.6 | 58.0 |
| 1970 | 13.4927 million | 41.4752 million | 17.0 | 18.2 | 7.00 | 6.02 | 46.5 | 54.9 |
| 1980 | 19.1898 million | 52.4901 million | 16.4 | 19.4 | 6.99 | 4.79 | 51.3 | 65.3 |
| 1990 | 26.1102 million | 65.5045 million | 16.5 | 20.5 | 6.20 | 3.60 | 52.0 | 69.0 |
| 2000 | 34.2601 million | 77.1540 million | 17.4 | 23.7 | 5.67 | 2.03 | 53.2 | 72.8 |
| 2010 | 44.7585 million | 87.4552 million | 17.1 | 28.2 | 5.22 | 1.91 | 61.1 | 73.6 |
| 2023 | 66.6176 million | 100.352 million | 18.2 | 33.4 | 4.61 | 1.91 | 67.0 | 74.6 |
| 2030* | 80.9131 million | 104.255 million | 19.1 | 36.7 | 4.16 | 1.82 | 68.4 | 75.7 |
| 2040* | 103.999 million | 108.438 million | 20.8 | 39.2 | 3.63 | 1.77 | 70.3 | 77.3 |
| 2050* | 129.621 million | 110.009 million | 22.8 | 41.2 | 3.23 | 1.75 | 71.8 | 78.9 |
| 2060* | 156.851 million | 108.397 million | 24.8 | 44.6 | 2.94 | 1.73 | 73.4 | 80.5 |
| 2070* | 184.886 million | 105.261 million | 26.9 | 46.6 | 2.72 | 1.72 | 74.8 | 82.0 |
| 2080* | 212.537 million | 101.039 million | 29.0 | 47.3 | 2.53 | 1.72 | 76.3 | 83.4 |
| 2090* | 238.810 million | 96.4070 million | 31.2 | 48.9 | 2.39 | 1.71 | 77.8 | 84.8 |
| 2100* | 262.835 million | 91.7051 million | 33.3 | 50.3 | 2.26 | 1.70 | 79.2 | 86.1 |
* UN projection, medium variant. People at mid-year; ages and life expectancy in years.
TZA − VNM · 1950–2100 · every age
Which ages each place has more of
Each column is a year and each row an age, from babies at the bottom to 100 at the top. The shade of a cell shows which place has more of its people at that age — the key beside the picture tells you which shade is Tanzania and which is Vietnam, and the in-between shade means the same. Because it compares shares, a small place and a large one can be compared fairly.
236 countries · 1950–2100
Where they sit among all countries
Every country in the world, every year from 1950 to 2100. The grey cloud shows where most countries are; Tanzania is drawn in solid blue squares and Vietnam in open orange squares, so you can see whether each is ahead of the crowd, behind it or in the middle.
More comparisons
Keep exploring
Each place on its own: Tanzania · Vietnam. Or pick any two places with the boxes at the top of this page.
Other comparisons
- Egypt and Tanzania
- Germany and Tanzania
- Iran and Tanzania
- Kenya and Tanzania
- Philippines and Tanzania
- Tanzania and Thailand
- Tanzania and Türkiye
- Tanzania and United Kingdom
- Japan and Vietnam
- Kenya and Vietnam
- Philippines and Vietnam
- South Africa and Vietnam
- Thailand and Vietnam
- Tanzania and Eastern Africa
- Vietnam and South-Eastern Asia
Apparatus
Sources and method
Both sides of this comparison come from the UN Population Division's World Population Prospects 2024 — the same release, the same tables, counted to 2023 and projected beyond it on the medium variant. That shared origin is what a comparison rests on.
How the median age and the “100 people” pictures are worked out, and why the pictures of every country leave the regions out: how the figures here are put together.
There are 250 ready-made comparisons on this site. For anything else, name two places in the boxes at the top of the page.
Sources: UN WPP 2024 · flag-icons. Every source, its licence and how to cite it →
Verified 2026-09-30 · 73 canaries