This study investigates the relationship between net migration and the economic development of European countries, focusing on the impact of net migration on the level of GDP. Using correlation-regression analysis based on data from Eurostat and the State Statistics Service of Ukraine for the period 2014–2021, the study finds a positive relationship between net migration and GDP. The analysis shows that an increase in net migration leads to an increase in GDP. For example, an increase in net migration to Poland by 1% is associated with an increase in GDP by 1.43 million euros. The study also highlights the significant impact of net migration on the GDP of various European countries, with the highest correlation coefficients observed in countries such as Latvia, Poland, and Iceland. The study also notes that the impact of net migration on GDP varies across countries, with some countries showing a negative relationship. The study concludes that net migration is a significant factor in economic development, and that policies should be implemented to manage migration effectively. The study also forecasts that the increase in net migration from Ukraine to Poland due to the war in Ukraine could increase Poland's GDP by 0.08% or 529.54 million euros in 2023. The study emphasizes the importance of migration in economic growth and the need for policies that support migration and economic development.This study investigates the relationship between net migration and the economic development of European countries, focusing on the impact of net migration on the level of GDP. Using correlation-regression analysis based on data from Eurostat and the State Statistics Service of Ukraine for the period 2014–2021, the study finds a positive relationship between net migration and GDP. The analysis shows that an increase in net migration leads to an increase in GDP. For example, an increase in net migration to Poland by 1% is associated with an increase in GDP by 1.43 million euros. The study also highlights the significant impact of net migration on the GDP of various European countries, with the highest correlation coefficients observed in countries such as Latvia, Poland, and Iceland. The study also notes that the impact of net migration on GDP varies across countries, with some countries showing a negative relationship. The study concludes that net migration is a significant factor in economic development, and that policies should be implemented to manage migration effectively. The study also forecasts that the increase in net migration from Ukraine to Poland due to the war in Ukraine could increase Poland's GDP by 0.08% or 529.54 million euros in 2023. The study emphasizes the importance of migration in economic growth and the need for policies that support migration and economic development.