The study’s objective is to reflect on the cultural and legal experience of the United States Supreme Court as the oldest body of constitutional justice, with its long legal tradition, which seems essential for states undergoing constitutional law reform. The study used general scientific methods of analogy, classification, typology, systematization, analysis, and others, as well as special scientific methods such as systematic, functional, historical, the study of judicial practice (which included observation and description), the method of comparative law, etc., which allowed to present the views of the authors, and thus to achieve the objective of the study. The results and novelty of the work are to identify the cultural and legal significance of the activities of the highest judicial instance of the United States in the formation of the legal culture of American society. The authors address the genesis of the cultural and legal aspects of the U.S. Supreme Court, which served as the basis for the formation and implementation of constitutional rights and freedoms in the American state.