Population forecast · World Bank data
United States population forecast
Population, total
Latest · 2025
341.8M
The population of the United States is forecast at 345.1M in 12 months (2026), with an 80% range of 341.6M to 349.2M. The latest World Bank figure is 341.8M for 2025.
In 24 months (2027) and 36 months (2028) the model projects 346.6M and 347.0M (+1.5% 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
- 343.4M▲ +0.5%80%: 341.7M – 345.5M
- 12 months2026
- 345.1M▲ +1.0%80%: 341.6M – 349.2M
- 24 months2027
- 346.6M▲ +1.4%80%: 341.8M – 351.1M
- 36 months2028
- 347.0M▲ +1.5%80%: 339.6M – 352.2M
Backtest · last 5 years
How accurate has this been?
| Horizon | Tests | Avg. error | Naive error | In 80% range |
|---|---|---|---|---|
| 12 months | 5 | 1.40M | 2.04M | 80% |
| 24 months | 4 | 1.94M | 4.53M | 100% |
| 36 months | 3 | 2.70M | 6.96M | 100% |
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 | 341.8M | +0.52% |
| 2024 | 340.0M | +0.96% |
| 2023 | 336.8M | +0.83% |
| 2022 | 334.0M | +0.57% |
| 2021 | 332.1M | +0.16% |
| 2020 | 331.6M | +0.41% |
| 2019 | 330.2M | +0.52% |
| 2018 | 328.5M | +0.59% |
| 2017 | 326.6M | +0.70% |
| 2016 | 324.4M | +0.79% |
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 States
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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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