Which one of the regions of former Yugoslavia has the highest standard of living?

Slovenia has the highest standard of living among the regions of former Yugoslavia. It boasts a well-developed economy, high levels of education, and a robust social welfare system. Slovenia's GDP per capita is significantly higher than that of its neighbors, and it consistently ranks well in quality of life indices. Additionally, the country offers a good healthcare system and a stable political environment, contributing to its overall high living standards.