Corruption in various sectors causes serious damage not only to individual economies, countries, and regions but also to humanity as a whole. This paper analyzes the state of corruption in the Republic of Tatarstan, the manifestations of which restrain the development of the Republic, and presents the results of a pilot sociological study that demonstrate changes in the perception of problems of corruption in society. The sustainable development of a region is influenced by various economic and social factors. The results of this research show that one of these factors is corruption, which is often used as a tool for managing territories at various levels. It is a serious obstacle to the achievement of continuous sustainable development of a region, as it impedes the building of harmonious relations between state, government, society, and business. Sustainable development of a region can be described as a system and as a process. In this study, "sustainable development" refers to the process in which various stakeholder interactions take place that influence the established order of relations in the region. The findings suggest that when assessing the effectiveness of a region's sustainable development, the level of corruption should be considered as an indicator of its stability. Some measures were proposed to improve the organization of anticorruption work in the Republic of Tatarstan for leveling social tensions in society.