Spain vs Argentina population
In 2025 Spain has 1.08× as many people as Argentina: 49.4 million against 45.9 million. The difference is 3.5 million.
Argentina is 93% the size of Spain.
How the two compare
In 2025 Spain has 1.08× as many people as Argentina: 49.4 million against 45.9 million. The difference is 3.5 million. Argentina is 93% the size of Spain. Together they hold 1.2% of the 8.19 billion counted here.
Then and now
In 1960 the order was Spain ahead, 30.5 million to 20.4 million, a ratio of 1.49×. Since then Spain has grown 1.62× and Argentina 2.25×, averaging 0.75% and 1.25% a year.
The lines cross: Argentina moves ahead of Spain in 2040, which is inside the projection and depends on the trends continuing. Before that year the order shown in the rest of this page still holds.
Towards 2050
Projected to 2050, Spain reaches 45.7 million (7.4% fewer than today) and Argentina reaches 48.3 million (5.4% more). By then the ratio is 1.06× in favour of Argentina.
Land and people
Land changes the picture: Spain has 499,697 km² and 99 people per km², Argentina has 2,736,690 km² and 17 per km². Spain is 5.9× more densely settled.
Behind the totals, fertility is 1.1 in Spain and 1.5 in Argentina; life expectancy is 83.9 against 77.5 years; 21.6% against 12.6% of people are 65 or older. The younger the population, the longer it keeps growing after birth rates fall.
Where the numbers come from
Figures are the World Bank's "Population estimates and projections" series, built from United Nations and national statistics. Values up to 2025 are estimates; 2026–2050 are projections that assume current fertility, mortality and migration trends continue, so they are not forecasts of events such as wars or policy changes. Territories are listed as the World Bank lists them, and a small number of places have gaps in some years.
How the numbers are taken. Total population from the World Bank's population estimates and projections (built from United Nations and national statistics). Values to 2025 are estimates; 2026–2050 are projections that continue current fertility, mortality and migration trends. Sources and limits.