Revenues from tourism represent a significant part of the gross domestic product (GDP) of the Republic of Croatia, constituting one of the key sectors of the economy. Croatia is recognizable for its tourist offer, including the coast of the Adriatic Sea, cultural and historical sights and natural beauty, which attracts millions of tourists every year. This industry not only generates direct income through accommodation, catering and recreation, but also indirectly contributes to other sectors such as trade, transport and construction. The share of tourism revenue in Croatian GDP varies, but in years of strong tourist traffic it can reach more than 20%. This makes Croatia one of the countries with the highest share of tourism in GDP in the European Union. Such dependence on tourism brings significant economic benefits, including foreign exchange inflows, employment and regional development, especially in coastal areas. However, high dependence on tourism also makes the economy vulnerable to external shocks, such as economic crises, natural disasters and pandemics, therefore it is important for Croatia to diversify its economy and develop other sectors in order to reduce dependence on tourism and increase resistance to possible economic challenges in of the future. Investing in sustainable tourism, as well as encouraging innovation and technological development, can help achieve more stable economic growth. This paper analyzes the share of income from tourism in Croatian GDP, compares the contribution of tourism to GDP in relation to other activities, and highlights the potential challenges of a high degree of dependence of the economy on tourism.