This paper explores the determinants of a country's economic activity and its trends with respect to surrounding countries. Particular emphasis is placed on the most important macroeconomic indicator of development, which is gross domestic product. The goal of every economy is continuous economic growth. Therefore, it is important to understand the importance of gross domestic product. Business conditions are changing continuously and thus very often, after a period of prosperity and prosperity, a crisis can ensue. Therefore, economic expansion is replaced by recession which is characterized by declining in gross domestic product, employment and real incomes and increasing in inflation rate. Economic growth means an increase in production, production capacity and all other components of an economy. Economic growth is the increase in total output of the economy. The growth of the economy can be achieved through the growth of labour or capital goods, technology and productivity per worker. Economic growth is measured by the rate of growth by putting the gross domestic product and population of a particular country in the relationship. This indicator is called GDP per capita or GDP per capita. In this paper, the economic indicators of the Republic of Croatia were compared with selected countries in the region.