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Thailand population pyramid 2100

45,555,065 people in 2100 (UN medium projection). This page shows Thailand’s age and sex structure in 2100 and how it differs from 2026.

2100 population
45.6MUN medium projection
Median age
51.9 years2026: 41.0
Under age 15
11.4%2026: 14.1%
Age 65+
35.5%2026: 16.7%

Thailand population pyramid

2100 · Share of total by five-year age group and sex

Medium projection
Thailand population pyramid for 2100: males on the left and females on the right Male share Female share 100+ males: 99,485 (0.2%) 100+ females: 246,648 (0.5%) 100+ 95–99 males: 316,662 (0.7%) 95–99 females: 551,086 (1.2%) 95–99 90–94 males: 693,727 (1.5%) 90–94 females: 1,002,564 (2.2%) 90–94 85–89 males: 1,067,264 (2.3%) 85–89 females: 1,343,247 (2.9%) 85–89 80–84 males: 1,231,777 (2.7%) 80–84 females: 1,410,720 (3.1%) 80–84 75–79 males: 1,290,994 (2.8%) 75–79 females: 1,385,714 (3.0%) 75–79 70–74 males: 1,344,395 (3.0%) 70–74 females: 1,382,891 (3.0%) 70–74 65–69 males: 1,393,422 (3.1%) 65–69 females: 1,393,735 (3.1%) 65–69 60–64 males: 1,404,172 (3.1%) 60–64 females: 1,378,869 (3.0%) 60–64 55–59 males: 1,382,266 (3.0%) 55–59 females: 1,340,103 (2.9%) 55–59 50–54 males: 1,332,031 (2.9%) 50–54 females: 1,279,622 (2.8%) 50–54 45–49 males: 1,273,466 (2.8%) 45–49 females: 1,215,783 (2.7%) 45–49 40–44 males: 1,227,633 (2.7%) 40–44 females: 1,167,359 (2.6%) 40–44 35–39 males: 1,209,608 (2.7%) 35–39 females: 1,149,398 (2.5%) 35–39 30–34 males: 1,207,705 (2.7%) 30–34 females: 1,150,696 (2.5%) 30–34 25–29 males: 1,204,258 (2.6%) 25–29 females: 1,153,669 (2.5%) 25–29 20–24 males: 1,129,742 (2.5%) 20–24 females: 1,080,102 (2.4%) 20–24 15–19 males: 987,628 (2.2%) 15–19 females: 929,986 (2.0%) 15–19 10–14 males: 927,826 (2.0%) 10–14 females: 870,824 (1.9%) 10–14 5–9 males: 890,951 (2.0%) 5–9 females: 836,495 (1.8%) 5–9 0–4 males: 861,266 (1.9%) 0–4 females: 809,278 (1.8%) 0–4 10%5% Age 5%10%

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Use the publication-ready SVG, create a high-resolution PNG, or download the complete age-by-sex dataset.

SVG CSV data

Projection

Values for 2100 come from the UN World Population Prospects 2024 medium scenario. They depend on assumptions about fertility, mortality, and migration and are not forecasts guaranteed to occur.

Thailand age structure in 2100

In 2100, children under 15 are projected to make up 11.4% of the population, people aged 15–64 53.1%, and people aged 65 or older 35.5%. On these shares the structure is classed as older; see the guide to constrictive population pyramids.

The total age dependency ratio is projected to be 88.2 (21.5 children and 66.7 people aged 65+ per 100 aged 15–64). The largest five-year groups are 65–69, 60–64, 70–74, which together account for 18.2% of the population.

Fertility is projected to be 1.44 births per woman and life expectancy at birth 88.4 years. The population is projected to change by −0.75% during the year.

Thailand in 2100 compared with 2026

Between 2026 and 2100, the medium scenario has Thailand’s population falling by 36% and the median age rising by 10.9 years. The table sets the two years side by side; percentage-point differences compare shares, not counts.

Indicator20262100Change
Population71,559,61445,555,065−36.3%
Median age (years)41.051.9+10.9
Under 1514.1%11.4%−2.7 pts
Aged 15–6469.2%53.1%−16.1 pts
Aged 65+16.7%35.5%+18.8 pts
Fertility rate1.191.44+0.25
Life expectancy (years)77.188.4+11.3
Males per 100 females94.597.4+2.9

Thailand population by age and sex in 2100

Counts by five-year age group, with everyone aged 100 or older combined. Download the CSV for every chart year.

Age groupMaleFemaleTotalShare
0–4861,266809,2781,670,5443.7%
5–9890,951836,4951,727,4463.8%
10–14927,826870,8241,798,6503.9%
15–19987,628929,9861,917,6144.2%
20–241,129,7421,080,1022,209,8444.9%
25–291,204,2581,153,6692,357,9275.2%
30–341,207,7051,150,6962,358,4015.2%
35–391,209,6081,149,3982,359,0065.2%
40–441,227,6331,167,3592,394,9925.3%
45–491,273,4661,215,7832,489,2495.5%
50–541,332,0311,279,6222,611,6535.7%
55–591,382,2661,340,1032,722,3696.0%
60–641,404,1721,378,8692,783,0416.1%
65–691,393,4221,393,7352,787,1576.1%
70–741,344,3951,382,8912,727,2866.0%
75–791,290,9941,385,7142,676,7085.9%
80–841,231,7771,410,7202,642,4975.8%
85–891,067,2641,343,2472,410,5115.3%
90–94693,7271,002,5641,696,2913.7%
95–99316,662551,086867,7481.9%
100+99,485246,648346,1330.8%

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APA

World Population Pyramid. (2026, September 28). Thailand Population Pyramid 2100. https://worldpopulationpyramid.com/countries/thailand/2100/

MLA

“Thailand Population Pyramid 2100.” World Population Pyramid, 28 Sept. 2026, worldpopulationpyramid.com/countries/thailand/2100/.

Chicago

World Population Pyramid. “Thailand Population Pyramid 2100.” Last modified September 28, 2026. https://worldpopulationpyramid.com/countries/thailand/2100/.

Underlying data: United Nations, Department of Economic and Social Affairs, Population Division (2024). World Population Prospects 2024.

Frequently asked questions

What is the projected population of Thailand in 2100?

UN World Population Prospects 2024 projects Thailand's population in 2100 at 45,555,065 under the medium scenario.

What will be the median age in Thailand in 2100?

The median age is projected to be 51.9 years, compared with 41.0 years in 2026.

What share of Thailand is projected to be under 15 or 65+ in 2100?

11.4% are projected to be under 15 and 35.5% aged 65 or older, giving a total age dependency ratio of 88.2.

Sources and notes