United Kingdom Population Pyramid 2045
United Kingdom in 2045
United Nations projections (medium variant) put the population of the United Kingdom at 74,753,657 in 2045. That would be 2.9% more than in 2035 (72,656,815).
The median age is projected at 43.5 years, with 24.4 children under 15 and 39.0 people aged 65 or over for every 100 people of working age (15–64). This is a constrictive pyramid — its base is narrower than its middle, the signature of sustained low birth rates and population ageing.
Data source: United Nations World Population Prospects, 2024 revision (medium variant) — last updated July 2024.
The fertility rate of the United Kingdom was 1.56 births per woman in 2023, under the 2.1 needed to replace each generation.
Source: World Bank World Development Indicators, latest available year.
A child born there in 2023 could expect to live 81.2 years on average (83.2 years for girls, 79.4 for boys).
Source: World Bank World Development Indicators, latest available year.
8,730,397 immigrants live in United Kingdom, 12.6% of the population.
| India | 1,044,779 |
| Poland | 902,193 |
| Romania | 713,578 |
| Pakistan | 703,309 |
| Ireland | 360,446 |
4,751,880 people born in United Kingdom live in other countries.
| Australia | 1,107,102 |
| United States of America | 894,789 |
| Canada | 427,526 |
| Spain | 294,986 |
| Ireland | 293,559 |
Source: United Nations International Migrant Stock 2024.
| Country | Population | Median age | Relative size |
|---|---|---|---|
| United Kingdom | 74,753,658 | 43.5 | |
| Sweden | 11,202,872 | 44.8 | |
| Denmark | 6,134,656 | 44.8 | |
| Ireland | 5,916,936 | 42.8 | |
| Norway | 5,886,018 | 45.9 |





