Educational structure of a population has a significant influence on the economy and development of a country. Analysing how educational structure of a population changes over time is important for improving the quality of education, e.g. educational system and process. This thesis analyses the educational structure of the adult population of Croatia in 2001 and 2011, on the country and county level, as well as for gender, based on the official census data. Furthermore, the educational structure of Croatia was compared to the European Union average, based on the relevant EUROSTAT data for 2011. For Croatia, the analysis showed positive trends, i.e. the share of those without any education is decreasing, while the share of those with high education degrees increases. However, those who have completed upper secondary education represent the highest share of the Croatian population. It is clear that Croatia has recognised the importance of education and is stepping up its efforts in this field. Nevertheless, the share of those completing high education is still below the European Union average. Therefore, Croatia needs to continue its efforts in order to create a better educational system, that is more efficient and more easily accessible to all, as well as raise awareness about the importance of education.