Compare · UN World Population Prospects 2024

Kenya and Tanzania, side by side

Line both places up by age in 2026. In Kenya, half are older than 21; in Tanzania, half are older than 19.

UN estimates for mid-2023: Kenya 55,339,002 people · Tanzania 66,617,606

Kenya 58.6 million people Half are older than 21 3 in 100 are 65 or older

Tanzania 72.6 million people Half are older than 19 3 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

KEN × TZA · 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.

Kenya

Children, under 15: 36
Aged 15 to 64: 61
Aged 65 and over: 3

Tanzania

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

KEN × TZA · families and lifetimes

Children, and how long lives last

If the birth rates of this year held for a whole lifetime, a woman in Kenya would have about 3.1 children and a woman in Tanzania about 4.4. A baby born in Kenya this year can expect to live about 64 years. In Tanzania, about 68.

Children per woman, 2026

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

Kenya 3.1

Tanzania 4.4

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.

Kenya 64 years

Tanzania 68 years

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

KEN × TZA · 1950–2100 · how many

How big, and where they are heading

Tanzania is the larger of the two, with about 20% more people than Kenya: 72.6 million to 58.6 million.

Set each against its own 1950 self and Kenya's population is 10.2 times what it was in 1950, Tanzania's population is 9.5 times what it was in 1950.

Kenya's population is expected to peak in 2098. Meanwhile Tanzania's population is still growing in 2100. In 2100: 104 million in Kenya, 263 million in Tanzania (UN projection, medium).

Show the numbers

Year	Kenya: people	Tanzania: people	Kenya: half older than	Tanzania: half older than	Kenya: children per woman	Tanzania: children per woman	Kenya: life expectancy	Tanzania: life expectancy
1950	5.76918 million	7.62516 million	17.0	17.0	7.39	6.18	36.9	41.0
1960	7.69531 million	9.90142 million	15.6	17.3	7.65	6.54	48.5	42.6
1970	11.3688 million	13.4927 million	14.3	17.0	7.94	7.00	54.1	46.5
1980	16.0185 million	19.1898 million	14.4	16.4	7.53	6.99	59.2	51.3
1990	22.8926 million	26.1102 million	15.3	16.5	6.13	6.20	58.3	52.0
2000	30.6429 million	34.2601 million	16.6	17.4	5.14	5.67	56.1	53.2
2010	41.5986 million	44.7585 million	17.9	17.1	4.45	5.22	60.9	61.1
2023	55.3390 million	66.6176 million	20.5	18.2	3.21	4.61	63.6	67.0
2030*	63.1022 million	80.9131 million	22.4	19.1	2.92	4.16	64.9	68.4
2040*	74.1089 million	103.999 million	25.0	20.8	2.61	3.63	66.5	70.3
2050*	83.5932 million	129.621 million	27.3	22.8	2.35	3.23	67.9	71.8
2060*	91.5696 million	156.851 million	29.8	24.8	2.18	2.94	69.2	73.4
2070*	97.8257 million	184.886 million	32.4	26.9	2.04	2.72	70.4	74.8
2080*	101.744 million	212.537 million	34.7	29.0	1.95	2.53	71.7	76.3
2090*	103.764 million	238.810 million	36.6	31.2	1.89	2.39	73.0	77.8
2100*	104.195 million	262.835 million	38.5	33.3	1.84	2.26	74.4	79.2

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

KEN − TZA · 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 Kenya and which is Tanzania, 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; Kenya is drawn in solid blue squares and Tanzania 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: Kenya · Tanzania. 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.

This is one of 250 pairs with a page. The boxes at the top will take any other two places you want to see side by side.

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

Verified 2026-09-30 · 73 canaries