Europe faces a profound demographic shift over the coming decades, with the continent's population set to contract significantly by the end of the century. According to the latest projections from Eurostat, the statistical office of the European Union, the bloc's population will decline by 11.7% between 2025 and 2100. This represents a loss of 53 million people, reducing the total from 452 million to 399 million. The forecast, which includes assumptions about future migration, underscores a future where one in three Europeans will be over the age of 65.
Divergent National Trajectories Across the Continent
The overall decline masks starkly different futures for individual nations. Among thirty European countries analysed, twelve are expected to see population growth by 2100, while eighteen will experience contraction. The steepest declines are concentrated in Eastern and Southern Europe. Latvia (-33.9%), Lithuania (-33.4%), Poland (-31.6%), and Greece (-30.1%) are projected to lose more than three in ten of their current inhabitants.
Significant losses are also forecast for Bulgaria (-28%), Croatia (-27%), Slovakia (-26.7%), Romania (-24.3%), Italy (-24%), and Hungary (-22.5%). More moderate declines between 10% and 20% are expected in Portugal, Estonia, Czechia, Finland, Slovenia, and Germany.
In contrast, several countries with relatively smaller populations are set for substantial growth. Luxembourg leads with a projected 36.4% increase, followed by Iceland (27.1%) and Malta (26%). Other nations anticipating growth above 10% include Switzerland (16.9%), Ireland (14.6%), Norway (11.8%), and Sweden (10%).
Migration Emerges as the Decisive Factor
Demographers point to migration, rather than fertility or mortality rates, as the key variable explaining these wide disparities. "This variation is mainly driven by the differences in past and projected migration rates, in combination with the differences in the age structure," explained Dr Tomas Sobotka, deputy director of the Vienna Institute of Demography.
He noted that countries with a history of low fertility and outmigration, such as those in Eastern Europe, now possess an older age structure with fewer people of reproductive age, creating a downward demographic momentum. Dr Anne Goujon, also of the Vienna Institute, emphasised the balance between natural change and net migration. "While all EU countries have low fertility, countries with sustained immigration can still grow despite low fertility beyond 2050, while countries with low fertility and weaker migration inflows or negative net migration balance tend to decline," she stated.
"Migration is the only factor that can ensure population growth in Europe. Obviously, assumptions regarding migration differ from country to country," said Dr Dmitri Jdanov from the Max Planck Institute for Demographic Research.
This dynamic is evident in the differing fates of the EU's largest economies. Among the 'Big Four', only Spain is projected to see any growth by 2100, albeit a modest 1.3%. France is expected to decline slightly by 2.5%, while Germany (-10.6%) and Italy (-24%) face sharper falls. Sobotka attributed Spain's relative stability to "a huge level of immigration in the last three decades," which offset very low fertility. France benefits from a higher fertility rate than most EU peers, a younger population structure, and moderate immigration. Italy, conversely, is hampered by both lower fertility and an aged population. These shifts will reconfigure the continent's demographic map, with Spain overtaking Italy to become the EU's third most populous nation.
Long-Term Implications and Shifting Rankings
The projected trends are not linear, with some populations growing before eventually declining. However, the long-term outcome will reshape Europe's internal rankings. Switzerland is forecast to climb from 15th to 10th most populous, Ireland from 21st to 17th, and Norway from 19th to 16th. Conversely, Bulgaria will fall from 16th to 20th, Portugal from 10th to 13th, and Greece from 12th to 15th.
These demographic changes carry profound implications for economic stability and wealth distribution, pension systems, and labour markets across the continent. They may also influence cultural dynamics, as seen in efforts to preserve traditions from Venetian masks to other artisanal heritage in ageing societies. Furthermore, the link between societal structures and demographic behaviour is underscored by research indicating remote work is linked to higher fertility rates, suggesting policy and workplace changes could subtly influence future trends.
The Eurostat data presents a clear challenge for national governments and EU institutions: how to manage the economic and social consequences of a shrinking and ageing population, particularly in regions facing the most severe declines. The divergent paths of European nations highlight that demographic destiny is not uniform, but is powerfully shaped by migration policies and their ability to attract and integrate new residents.
