Most of Eastern Europe reached peak population at the end of the 1980s or early 1990s, with countries like Serbia and Bulgaria peaking in the late 1980s, and Belarus, Ukraine, and Poland reaching their peak in the early 1990s.
In contrast, Central and Southern Europe have either reached their peak population in the 21st century, as seen with Italy in 2014 and projected for Germany in 2024, or are yet to reach it. Factors like migration play a significant role, contributing to the continuous growth in populations of countries like France, the United Kingdom, and various Northern European nations.