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United States population pyramid 2100

421,278,889 people in 2100 (UN medium projection). This page shows United States’s age and sex structure in 2100 and how it differs from 2026.

2100 population
421.3MUN medium projection
Median age
45.3 years2026: 38.7
Under age 15
14.4%2026: 16.9%
Age 65+
28.4%2026: 18.8%

United States population pyramid

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

Medium projection
United States population pyramid for 2100: males on the left and females on the right Male share Female share 100+ males: 267,399 (0.1%) 100+ females: 475,699 (0.1%) 100+ 95–99 males: 1,873,247 (0.4%) 95–99 females: 2,539,185 (0.6%) 95–99 90–94 males: 5,518,119 (1.3%) 90–94 females: 6,351,556 (1.5%) 90–94 85–89 males: 8,387,985 (2.0%) 85–89 females: 8,811,585 (2.1%) 85–89 80–84 males: 9,796,716 (2.3%) 80–84 females: 9,854,913 (2.3%) 80–84 75–79 males: 10,538,728 (2.5%) 75–79 females: 10,275,417 (2.4%) 75–79 70–74 males: 11,240,017 (2.7%) 70–74 females: 10,742,250 (2.5%) 70–74 65–69 males: 11,842,898 (2.8%) 65–69 females: 11,183,509 (2.7%) 65–69 60–64 males: 12,429,041 (3.0%) 60–64 females: 11,629,862 (2.8%) 60–64 55–59 males: 12,752,632 (3.0%) 55–59 females: 11,842,199 (2.8%) 55–59 50–54 males: 12,725,951 (3.0%) 50–54 females: 11,748,916 (2.8%) 50–54 45–49 males: 12,606,203 (3.0%) 45–49 females: 11,600,057 (2.8%) 45–49 40–44 males: 12,604,987 (3.0%) 40–44 females: 11,591,772 (2.8%) 40–44 35–39 males: 12,742,994 (3.0%) 35–39 females: 11,742,876 (2.8%) 35–39 30–34 males: 12,946,395 (3.1%) 30–34 females: 11,989,096 (2.8%) 30–34 25–29 males: 12,971,137 (3.1%) 25–29 females: 12,107,233 (2.9%) 25–29 20–24 males: 12,245,481 (2.9%) 20–24 females: 11,497,110 (2.7%) 20–24 15–19 males: 10,926,210 (2.6%) 15–19 females: 10,244,600 (2.4%) 15–19 10–14 males: 10,565,623 (2.5%) 10–14 females: 9,919,025 (2.4%) 10–14 5–9 males: 10,423,765 (2.5%) 5–9 females: 9,818,833 (2.3%) 5–9 0–4 males: 10,224,081 (2.4%) 0–4 females: 9,683,586 (2.3%) 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.

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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.

United States age structure in 2100

In 2100, children under 15 are projected to make up 14.4% of the population, people aged 15–64 57.2%, and people aged 65 or older 28.4%. 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 74.8 (25.2 children and 49.7 people aged 65+ per 100 aged 15–64). The largest five-year groups are 25–29, 30–34, 55–59, which together account for 17.7% of the population.

Fertility is projected to be 1.65 births per woman and life expectancy at birth 89.2 years. The population is projected to change by +0.13% during the year.

United States in 2100 compared with 2026

Between 2026 and 2100, the medium scenario has United States’s population growing by 21% and the median age rising by 6.6 years. The table sets the two years side by side; percentage-point differences compare shares, not counts.

Indicator20262100Change
Population349,035,494421,278,889+20.7%
Median age (years)38.745.3+6.6
Under 1516.9%14.4%−2.5 pts
Aged 15–6464.3%57.2%−7.1 pts
Aged 65+18.8%28.4%+9.6 pts
Fertility rate1.621.65+0.03
Life expectancy (years)79.889.2+9.4
Males per 100 females101.0104.9+3.9

United States 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
0–410,224,0819,683,58619,907,6674.7%
5–910,423,7659,818,83320,242,5984.8%
10–1410,565,6239,919,02520,484,6484.9%
15–1910,926,21010,244,60021,170,8105.0%
20–2412,245,48111,497,11023,742,5915.6%
25–2912,971,13712,107,23325,078,3706.0%
30–3412,946,39511,989,09624,935,4915.9%
35–3912,742,99411,742,87624,485,8705.8%
40–4412,604,98711,591,77224,196,7595.7%
45–4912,606,20311,600,05724,206,2605.7%
50–5412,725,95111,748,91624,474,8675.8%
55–5912,752,63211,842,19924,594,8315.8%
60–6412,429,04111,629,86224,058,9035.7%
65–6911,842,89811,183,50923,026,4075.5%
70–7411,240,01710,742,25021,982,2675.2%
75–7910,538,72810,275,41720,814,1454.9%
80–849,796,7169,854,91319,651,6294.7%
85–898,387,9858,811,58517,199,5704.1%
90–945,518,1196,351,55611,869,6752.8%
95–991,873,2472,539,1854,412,4321.0%
100+267,399475,699743,0980.2%

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APA

World Population Pyramid. (2026, September 28). United States Population Pyramid 2100. https://worldpopulationpyramid.com/countries/united-states/2100/

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“United States Population Pyramid 2100.” World Population Pyramid, 28 Sept. 2026, worldpopulationpyramid.com/countries/united-states/2100/.

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World Population Pyramid. “United States Population Pyramid 2100.” Last modified September 28, 2026. https://worldpopulationpyramid.com/countries/united-states/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 United States in 2100?

UN World Population Prospects 2024 projects United States's population in 2100 at 421,278,889 under the medium scenario.

What will be the median age in United States in 2100?

The median age is projected to be 45.3 years, compared with 38.7 years in 2026.

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

14.4% are projected to be under 15 and 28.4% aged 65 or older, giving a total age dependency ratio of 74.8.

Sources and notes