Regionalism and local self-government represent the effort of regional units to control and manage the processes of political, social and economic activity, in such a way representing an act of democracy and Europeanization. The principles of solidarity, cohesion and decentralization are the basis of the European local government model. Legal legislation is ensured through conventions, charters and recommendations, which usually do not have the force of international law. The most important document is the European Charter, which establishes a way of governance through the principles of autonomy, subsidiarity, financial autonomy and equalization, solidarity, cooperation and trust within and outside the region, and the principles of multilevel governance. Historically, the beginning of self-government in the Republic of Croatia is associated with the existence of the Kingdom of Croatia and Slavonia, and more intensive activity, conducted through three phases, takes place only after the first multi-party elections and the Homeland War. Croatia has adopted the European Charter and accepted the method of organization according to established principles. Despite this, it is characterized by high complexity, unbalanced territory, poor efficiency and a centralist model of governance. By implementing two large scientific projects of the Croatian Legal Center, and the adoption of new legislation, decentralization processes are enabled, with the transfer of some powers from the Government of the Republic of Croatia to local self-government in health, primary and secondary education, firefighting and social welfare. Local communities need to be continuously strengthened through political, economic and economic activities in order to provide them with sufficient financial resources that enable the safe functioning of public bodies and ensure unhindered development