This thesis explores the impact of foreign direct investment (FDI) on economic growth in Croatia and the Visegrád Group countries (Poland, Czech Republic, Slovakia, and Hungary). FDI is an important driver of economic development as it enables the transfer of capital, technology, and knowledge, improving the productivity and competitiveness of economies. The aim of this study is to analyze how FDI influences the growth of gross domestic product (GDP) using econometric models based on data from the period 2000 to 2023. The empirical analysis was conducted using a panel model, examining the effect of FDI on the economic growth of EU countries. Special attention was given to comparing Croatia with the other Visegrád Group countries to identify similarities and differences in attracting investments, as well as the reasons for differing economic growth outcomes. The paper also analyzes the key determinants of FDI, including political stability, the investment environment, and economic reforms. The results show that FDI has a positive effect on economic growth in the analyzed economies, but with varying degrees of intensity. The Visegrád Group countries exhibit a more stable growth in FDI inflows and a more positive impact on GDP, while Croatia lags behind due to slower implementation of reforms and a less competitive investment environment. It is concluded that Croatia needs to further improve its institutional and economic conditions to better leverage the potential of foreign investments and accelerate economic growth.