Compare · UN World Population Prospects 2024

Tanzania and Thailand, side by side

Line both places up by age in 2026. In Tanzania, half are older than 19; in Thailand, half are older than 42.

UN estimates for mid-2023: Tanzania 66,617,606 people · Thailand 71,702,435

Tanzania 72.6 million people Half are older than 19 3 in 100 are 65 or older

Thailand 71.6 million people Half are older than 42 17 in 100 are 65 or older

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.

Compare shapes Compare sizes

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.

Year 2026 · UN projection

estimatesprojections

men women projected

Verified 2026-09-30 · 73 canaries

TZA × THA · 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.

Tanzania

Children, under 15: 42
Aged 15 to 64: 55
Aged 65 and over: 3

Thailand

Children, under 15: 14
Aged 15 to 64: 69
Aged 65 and over: 17

TZA × THA · families and lifetimes

Children, and how long lives last

At today's rates, a woman in Tanzania would have about 4.4 children in her lifetime. In Thailand, about 1.2. 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 77 in Thailand.

Children per woman, 2026

Each figure is one child: how many children a woman would have in her lifetime at that year’s rates.

Tanzania 4.4

Thailand 1.2

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.

Tanzania 68 years

Thailand 77 years

Hatched marks are UN projections (medium variant), not measurements.

TZA × THA · 1950–2100 · how many

How big, and where they are heading

Tanzania is the larger of the two, with about as many people as Thailand: 72.6 million to 71.6 million.

Tanzania's population is 9.5 times what it was in 1950; Thailand's population is 3.5 times what it was in 1950.

Looking ahead: Tanzania's population is still growing in 2100, and Thailand's population peaked in 2022. In 2100: 263 million in Tanzania, 45.6 million in Thailand (UN projection, medium).

Show the numbers

Year	Tanzania: people	Thailand: people	Tanzania: half older than	Thailand: half older than	Tanzania: children per woman	Thailand: children per woman	Tanzania: life expectancy	Thailand: life expectancy
1950	7.62516 million	20.4284 million	17.0	18.5	6.18	6.36	41.0	45.2
1960	9.90142 million	26.8517 million	17.3	17.9	6.54	6.33	42.6	50.6
1970	13.4927 million	35.9544 million	17.0	17.3	7.00	5.45	46.5	56.5
1980	19.1898 million	45.6500 million	16.4	19.9	6.99	3.29	51.3	62.2
1990	26.1102 million	54.7383 million	16.5	24.2	6.20	2.06	52.0	68.9
2000	34.2601 million	63.0078 million	17.4	30.0	5.67	1.73	53.2	71.2
2010	44.7585 million	68.5794 million	17.1	34.5	5.22	1.56	61.1	75.0
2023	66.6176 million	71.7024 million	18.2	40.7	4.61	1.21	67.0	76.4
2030*	80.9131 million	71.2150 million	19.1	43.6	4.16	1.20	68.4	77.9
2040*	103.999 million	69.5350 million	20.8	47.0	3.63	1.25	70.3	79.9
2050*	129.621 million	66.3827 million	22.8	49.6	3.23	1.29	71.8	81.7
2060*	156.851 million	61.9770 million	24.8	51.5	2.94	1.33	73.4	83.3
2070*	184.886 million	57.4162 million	26.9	53.0	2.72	1.37	74.8	84.7
2080*	212.537 million	53.1630 million	29.0	53.0	2.53	1.40	76.3	86.0
2090*	238.810 million	49.1948 million	31.2	52.9	2.39	1.42	77.8	87.2
2100*	262.835 million	45.5551 million	33.3	52.9	2.26	1.44	79.2	88.4

* UN projection, medium variant. People at mid-year; ages and life expectancy in years.

TZA − THA · 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 Thailand, 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 Thailand 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 · Thailand. Or pick any two places with the boxes at the top of this page.

Other comparisons

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.

For how the median age is derived, why “100 people” can read a person high or low, and what the all-country pictures do and do not count, see the method.

250 comparisons have a page of their own; any other two places can be compared from the boxes at the top.

Sources: UN WPP 2024 · flag-icons. Every source, its licence and how to cite it →

Verified 2026-09-30 · 73 canaries