Poland is losing people and Peru is gaining them. Our path has Peru ahead from about 2029.

Satoria's forecast

Satoria forecast for Poland: how many people live there 35.6 million people in 2035, down from 36.4 million people in 2025 - could go either way. 80% range 33.0 million people to 38.6 million people.

The two lines meet in 2029.

Our central paths put Poland and Peru at about 35.9 million people each in 2029, and Peru ahead from then on. By 2035 the path has Peru near 38.2 million and Poland near 35.6 million. The two ranges for 2029 overlap, so the year could move.

It counts residents, not citizens, and it says nothing about money.

The World Bank counts everyone living in the country, whatever their passport, at the middle of the year. People arriving count, and people who leave stop counting. A bigger population is not a bigger economy or a higher income, and this measure has no good or bad direction.

Poland counts fewer people every year. Peru counts more.

Poland had 36.4 million people in 2025 and has lost people every year since 2019. Peru had 34.6 million and has gained people in every measured year of this series. Poland's own statistics office publishes three paths to 2060 and says openly that a projection can be wrong.

Which country is ahead in 2030?

One of these two is shrinking and the other is growing, and today they are less than two million people apart. Pick your answer, then see where our central paths put them.

Migration decides this, and it is the part every model handles worst.

Births and deaths move slowly and are close to settled for ten years. Who arrives and who leaves is not settled at all. Poland's own published range for 2029 reaches above Peru's whole range for that year, so a few strong years of arrivals would push the crossing past 2029.

Watch the gap, not the crossing.

The crossing year is the headline, but the ranges around 2029 overlap and the model's own bands are too narrow. The useful signal is the gap between the two counts each year. If it keeps closing at the pace of the last few years, 2029 holds.

Two countries going in opposite directions

In 2025 Poland had 36,435,861 people and Peru had 34,576,665. That is the whole gap: under two million, on a measure where both countries are counted the same way.

Poland's direction is the unusual one. The highest reading in the sixteen years this frozen series holds is 38,063,255 in 2011, and the count has fallen in every year from 2019 onwards. Peru's count rose in all sixteen, from 29,086,019 in 2010.

The measure is the World Bank's de facto population: all residents, regardless of legal status or citizenship, estimated at the middle of the year. The World Bank builds it from United Nations World Population Prospects, national statistics offices and Eurostat.

Where the two paths meet

On Satoria's central paths the lines meet in 2029: Poland at 35,934,830 and Peru at 35,993,777. The difference in that year is smaller than one year of change in either country, which is why the honest way to say it is around 2029.

Ten years out the two are further apart. Our path has Poland at 35,582,399 in 2035 and Peru at 38,248,178.

The ranges are the reason to be careful. In 2029 Poland's published range runs from 35,002,815 to 37,027,259 and Peru's from 35,621,012 to 36,590,803. They overlap, so Poland being ahead in 2029 sits inside our own forecast.

How wrong this could be

Satoria's model is well tested on this series for direction. On data held out from fitting and model choice across 51 country series its errors were 67% smaller than assuming no change. That is a good score, and it is about the central line only.

The ranges are the weak part. The model's 80% bands held the true value in about 69 of every 100 held-out years, so the real spread of outcomes is wider than the band the chart draws. Read the crossing as a direction with a soft date.

Statistics Poland reaches a similar broad conclusion by a different route and is honest about the same problem. It published three scenarios to 2060 on 31 August 2023 and wrote that the results of projections may be affected by a prediction error, declaring the medium scenario the main one. None of this is a claim about income: a bigger population is not a bigger economy.