We analyze class structures in Latin America from a sociological perspective, defining social classes as labor market positions. We propose an adaptation of the Erikson-Goldthorpe-Portocarero (EGP) class schema, which has become a standard in advanced industrialized countries but presents some limitations in accounting for labor relations in Latin America. Then, we use recent survey data for nine Latin American countries to delineate a map of current class structures and explore the association between social class and social/economic conditions. Our results indicate that class structures differ significantly not only between Latin America and advanced industrialized nations but also among Latin American countries. There is also a close association between class membership and socioeconomic conditions, including social protection and the risk of poverty. These results suggest that a sociological approach to social class is still pertinent to understanding the relationships among productive structures, labor markets, and living conditions in Latin America.