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Over the last three decades, the most populated Spanish cities have experienced significant spatial, social, and economic changes. The new urban economies have played an essential role in the acceleration of such transformations, entailing a range of both positive and negative impacts at the spatial, social, economic, and environmental levels. This paper presents a quantitative analysis of how the advancement of the globalization and deindustrialization processes has encouraged social polarization in the cities of Madrid, Barcelona, and Valencia, as well as a significant increase in intra-urban socioeconomic residential segregation. The article concludes by arguing that the increase in levels of social inequality and residential segregation reflects the trend towards polarized urban models, which reproduce in urban space the differences observed in the social structure. • Large Spanish cities have experienced significant changes due to globalization and deindustrialization processes. • The advancement of structural processes has led the emergence of a polarized occupational that tends towards greater wage inequality. • Social inequality has become a structural phenomenon in Spanish global cities • Residential segregation has increased due to the gentrification and touristification of urban centres and the suburbanization of poverty. • This dynamic indicates the emergence of polarized urban spaces, which reproduce in the territory the differences observed in the social structure. [ABSTRACT FROM AUTHOR]