The European Union is a supranational community created as a result of a process of cooperation and integration initiated between 6 member States. Today, after more than 60 years, the European Union has 28 member States, including the Republic of Croatia. EU membership has brought the Member States long-term political and democratic stability, an opportunity for new economic growth and development, a higher standard and a better social environment. All these advantages are also reflected daily in Croatia. EU membership, based on solidarity among Member States, has quite clear and concrete advantages for the Republic of Croatia. As one of the EU member states, the Republic of Croatia has an extraordinary influence on the everyday life of citizens in various fields, such as economy, agriculture, transport, environmental protection, education, travel and work opportunities, etc. It also enables Croatia to protect in these fields and promotes its own goals and interests. This paper will show what advantages Croatia's membership in the European Union has brought to Croatian tourism. When talking about Croatian tourism, it is relevant to mention the impact tourism has on the economy of the country, as evidenced by tourism traffic. The growth of tourist overnight stays in the Republic of Croatia, which is growing every year, is one of the relevant indicators of the state of Croatian tourism.