Population forecast · World Bank data
United Kingdom population forecast
Population, total
Latest · 2025
69.49M
The population of the United Kingdom is forecast at 69.55M in 12 months (2026), with an 80% range of 68.70M to 70.56M. The latest World Bank figure is 69.49M for 2025.
In 24 months (2027) and 36 months (2028) the model projects 69.56M and 69.72M (+0.3% versus 2025).
Display-only line. World Bank data is annual: the forecasts are the yearly points marked on the chart. The monthly line between them is a straight-line interpolation for display, not a monthly forecast.
- 6 monthsinterpolated · display only
- 69.52M■ 0.0%80%: 69.09M – 70.02M
- 12 months2026
- 69.55M▲ +0.1%80%: 68.70M – 70.56M
- 24 months2027
- 69.56M▲ +0.1%80%: 68.51M – 70.89M
- 36 months2028
- 69.72M▲ +0.3%80%: 68.37M – 71.20M
Backtest · last 5 years
How accurate has this been?
| Horizon | Tests | Avg. error | Naive error | In 80% range |
|---|---|---|---|---|
| 12 months | 5 | 0.30M | 0.55M | 80% |
| 24 months | 4 | 0.80M | 1.26M | 25% |
| 36 months | 3 | 1.04M | 1.98M | 33% |
We re-ran the model as if standing at past dates, using only the data available then. Avg. error is the mean absolute gap between the median and what happened; naive assumes no change from the last value. A well-calibrated 80% range contains about 80% of outcomes. Annual series have few test points, so treat these as rough. Methodology
Source data
Recent values
| Year | Value | Change |
|---|---|---|
| 2025 | 69.49M | +0.30% |
| 2024 | 69.28M | +1.10% |
| 2023 | 68.53M | +1.32% |
| 2022 | 67.64M | +0.98% |
| 2021 | 66.98M | +0.36% |
| 2020 | 66.74M | +0.17% |
| 2019 | 66.63M | +0.51% |
| 2018 | 66.29M | +0.49% |
| 2017 | 65.96M | +0.55% |
| 2016 | 65.61M | +0.80% |
About this forecast
- Source
- World Bank, World Development Indicators · series SP.POP.TOTL
- Data through
- 2025 · 66 observations
- Forecast updated
- Sep 28, 2026
- Model
- TimesFM 2.5 (Google Research, Apache-2.0), zero-shot
More forecasts for United Kingdom
United Kingdom overviewOther population forecasts
All 40Statistical model, not financial advice. This forecast is generated automatically from public data; the 80% range means outcomes are expected outside it about one time in five. Don't make financial decisions based only on it.
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