The goal of this paper is outlining the issues of corruption perception in public opinion, offering an overview of quantitative data sources available for the Czech Republic and conducting a descriptive analysis of selected data sources to map the current state and development of corruption perception in the Czech Republic. The analysis lends special focus to data from the research project Trends of Czechia, conducted by the Czech Television and consulted by the Department of Sociology of the Faculty of Arts, Charles University in Prague.