The proclamation of the Act on State Independence of Ukraine is a significant milestone in the history of the Ukrainian people on their way to national self-determination. A new phase of development has begun since 1991 when institutional factors have become crucial. First of all the creation of the Ukrainian state as a new national-state phenomenon takes place. During the years of independencethe process of Ukrainian state development was accompanied by opposition of political forces, which defended the multidirectional vectors of civilization development.The article deals with the issues of the European choice of Ukraine, as a strategic orientation of the socio-political development of the country, a priority direction of its national-state self-determination. The authors set out to analyze the prerequisites, substantive aspects, major internal and external factors that have influenced Ukraine's choice of a European vector of development.The study is based on the principles of objectivity, dialectics, historicism, social determinism, pluralism. The authors use general scientific methods, including inductive-deductive, analogies, modeling, etc. The comparative method has become an instrument of comparison, and consequently knowledge of the peculiarities of the state-political systems of Ukraine and other countries, which have become the benchmarks in the process of Ukraine's foreign policy self-determination.The article analyzes the attitude of Ukrainian citizens to the foreign policy and foreign economic development vectors of our country. It is revealed that the general rejection of the multilateralismpolicy significantly changed due to the Orange Revolution, when a sharp polarization occurred in society. The denial of the negative practices of V. Yanukovych's regime was manifested in the non-alternative choice of the European vector of Ukraine's development. The period of the presidency of P. Poroshenko has once again proved that only a radical implementation of the political, legal and social norms and standards of the EU will make it possible to overcome the oligarchic traits of the state – political system of Ukraine.Ukraine's European integration aspirations, such as a manifestation of its national-state self-determination, began to gain international legal prominence from the moment when the EU embarked on an enlargement to the East course. Ukraine, as a candidate for membership in a united Europe, has to undergo a series of transformations to adapt to EU norms and standards.However, the European choice as a project of national self-determination was confronted with a number of contradictions and inconsistencies between the mutual expectations of the subjects of this process, which led to the crisis of the whole project and political crises in Ukraine. A number of factors have hindered the implementation of the European integration plan, ranging from the internal instability of Western orientations within the country itself, the unwillingness of European Union members to further enlargement, and the massive opposition from Russia seeking to keep Ukraine in its political orbit.