International organizations in the modern world play an important role in ensuring cooperation between states, developing global strategies and solving international problems. Classification of various international organizations into categories for the purpose of their systematic study is not based on a priori generally accepted criteria. Thus, none of the existing classifications of international organizations, even if they satisfy a significant part of differentiated research needs, can be considered as based on codified criteria. The relative typology of all international organizations entails their classification, sometimes based on criteria that serve the specific theoretical needs of a particular study. Although this is not the case here, it should be noted that the following distinctions of international organizations are mainly relevant to the study of the legal aspects of the phenomenon. International organizations can be classified according to various criteria, such as target orientation, structure, method of participation of states and others. One of the key criteria is functional orientation. Thus, there are political, economic, social, humanitarian and military organizations, each of which has its own specific tasks and functions. Some organizations are based on the principle of sovereignty, where each state has the right to make an independent decision on participation in the organization’s activities. In the light of globalization and the growing complexity ofinternationalrelations, understanding the classification of international organizations is becoming extremely important for solving global problems and ensuring peaceful coexistence in the international arena. Studying their functions, structures, and participation mechanisms helps countries and organizations to cooperate more effectively and solve important global issues. The role of international organizations in the modern world cannot be overestimated. They facilitate cooperation between states, resolve international conflicts, provide humanitarian aid, develop economies, and implement joint strategies for environmental protection. International organizations act as mediators and coordinators in solving major global problems, ensuring stability and progress in international relations.