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United Kingdom population pyramid 2100

74,305,411 people in 2100 (UN medium projection). This page shows United Kingdom’s age and sex structure in 2100 and how it differs from 2026.

2100 population
74.3MUN medium projection
Median age
47.9 years2026: 40.2
Under age 15
13.4%2026: 16.7%
Age 65+
31.3%2026: 19.9%

United Kingdom population pyramid

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

Medium projection
United Kingdom population pyramid for 2100: males on the left and females on the right Male share Female share 100+ males: 59,739 (0.1%) 100+ females: 108,971 (0.1%) 100+ 95–99 males: 356,683 (0.5%) 95–99 females: 508,303 (0.7%) 95–99 90–94 males: 1,071,948 (1.4%) 90–94 females: 1,290,091 (1.7%) 90–94 85–89 males: 1,736,005 (2.3%) 85–89 females: 1,889,464 (2.5%) 85–89 80–84 males: 1,987,816 (2.7%) 80–84 females: 2,049,313 (2.8%) 80–84 75–79 males: 2,012,925 (2.7%) 75–79 females: 2,018,063 (2.7%) 75–79 70–74 males: 2,050,421 (2.8%) 70–74 females: 2,021,122 (2.7%) 70–74 65–69 males: 2,085,177 (2.8%) 65–69 females: 2,033,671 (2.7%) 65–69 60–64 males: 2,158,669 (2.9%) 60–64 females: 2,089,435 (2.8%) 60–64 55–59 males: 2,229,495 (3.0%) 55–59 females: 2,147,044 (2.9%) 55–59 50–54 males: 2,219,361 (3.0%) 50–54 females: 2,129,901 (2.9%) 50–54 45–49 males: 2,147,291 (2.9%) 45–49 females: 2,055,898 (2.8%) 45–49 40–44 males: 2,079,647 (2.8%) 40–44 females: 1,987,856 (2.7%) 40–44 35–39 males: 2,056,039 (2.8%) 35–39 females: 1,963,330 (2.6%) 35–39 30–34 males: 2,080,474 (2.8%) 30–34 females: 1,986,795 (2.7%) 30–34 25–29 males: 2,128,306 (2.9%) 25–29 females: 2,033,772 (2.7%) 25–29 20–24 males: 2,056,733 (2.8%) 20–24 females: 1,962,630 (2.6%) 20–24 15–19 males: 1,841,417 (2.5%) 15–19 females: 1,749,361 (2.4%) 15–19 10–14 males: 1,749,829 (2.4%) 10–14 females: 1,660,336 (2.2%) 10–14 5–9 males: 1,692,748 (2.3%) 5–9 females: 1,605,703 (2.2%) 5–9 0–4 males: 1,649,393 (2.2%) 0–4 females: 1,564,238 (2.1%) 0–4 10%5% Age 5%10%

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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 Kingdom age structure in 2100

In 2100, children under 15 are projected to make up 13.4% of the population, people aged 15–64 55.3%, and people aged 65 or older 31.3%. 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 80.8 (24.1 children and 56.6 people aged 65+ per 100 aged 15–64). The largest five-year groups are 55–59, 50–54, 60–64, which together account for 17.5% of the population.

Fertility is projected to be 1.60 births per woman and life expectancy at birth 90.6 years. The population is projected to change by −0.18% during the year.

United Kingdom in 2100 compared with 2026

Between 2026 and 2100, the medium scenario has United Kingdom’s population growing by 6% and the median age rising by 7.7 years. The table sets the two years side by side; percentage-point differences compare shares, not counts.

Indicator20262100Change
Population69,931,52874,305,411+6.3%
Median age (years)40.247.9+7.7
Under 1516.7%13.4%−3.3 pts
Aged 15–6463.3%55.3%−8.0 pts
Aged 65+19.9%31.3%+11.4 pts
Fertility rate1.531.60+0.07
Life expectancy (years)81.790.6+8.9
Males per 100 females97.1101.6+4.5

United Kingdom 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
0–41,649,3931,564,2383,213,6314.3%
5–91,692,7481,605,7033,298,4514.4%
10–141,749,8291,660,3363,410,1654.6%
15–191,841,4171,749,3613,590,7784.8%
20–242,056,7331,962,6304,019,3635.4%
25–292,128,3062,033,7724,162,0785.6%
30–342,080,4741,986,7954,067,2695.5%
35–392,056,0391,963,3304,019,3695.4%
40–442,079,6471,987,8564,067,5035.5%
45–492,147,2912,055,8984,203,1895.7%
50–542,219,3612,129,9014,349,2625.9%
55–592,229,4952,147,0444,376,5395.9%
60–642,158,6692,089,4354,248,1045.7%
65–692,085,1772,033,6714,118,8485.5%
70–742,050,4212,021,1224,071,5435.5%
75–792,012,9252,018,0634,030,9885.4%
80–841,987,8162,049,3134,037,1295.4%
85–891,736,0051,889,4643,625,4694.9%
90–941,071,9481,290,0912,362,0393.2%
95–99356,683508,303864,9861.2%
100+59,739108,971168,7100.2%

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APA

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

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

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

UN World Population Prospects 2024 projects United Kingdom's population in 2100 at 74,305,411 under the medium scenario.

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

The median age is projected to be 47.9 years, compared with 40.2 years in 2026.

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

13.4% are projected to be under 15 and 31.3% aged 65 or older, giving a total age dependency ratio of 80.8.

Sources and notes