How many people will live in Ukraine

Every reconstruction plan, pension calculation, school building programme and infrastructure design rests on an assumption about how many people will be here. That assumption is usually implicit, and it deserves to be made explicit.

The starting point

Ukraine's population was declining before 2014 and before 2022, for reasons common across Eastern Europe: birth rates far below replacement since the 1990s, high emigration of working-age people, and an ageing structure.

The war accelerated every one of those trends simultaneously.

Why the range is so wide

Nobody knows how many people are currently where. Registration abroad is incomplete, movement continues in both directions, and the last full census was a very long time ago. Serious estimates differ by millions.

The largest single unknown is return, which is discussed elsewhere in this record and is decided household by household over years.

What planning should do about it

Plan for a range and build for the lower end where the asset is expensive and permanent. A school with too few pupils is a manageable problem; a district heating network sized for a population that never arrives bankrupts a municipality for forty years.

Design for flexibility: buildings that can change use, infrastructure that can be extended, services that can scale.

The uncomfortable part

A smaller population is not automatically a poorer country. Output per person is what determines living standards, and several small European countries are wealthy precisely because they invested in productivity rather than headcount.

Planning for a smaller, older, more productive Ukraine is a legitimate strategy. Planning for a return to the population of 1991 is not a strategy; it is a hope with a budget attached.

That every plan assumes a population number without stating it is a mistake I have made myself: I once built a ten-year investment plan on the assumption that the workforce would stay as it was. The uncomfortable part is this — with a range this wide, planning against a single figure is not a plan but a wish. What should be done is to plan against scenarios.