In this work we analysed various features or facets in three contemporary Mexican metropolitan cities: multiculturalism, inequity, social and urban fragmentation, public insecurity and urban projects. The article takes stock of the prevailing situation drawn up on the basis of the authors’ research projects and the review of the recent literature on the subject. It is therefore essentially theoretical work. Neste trabalho analysed the following traits or facetas em Três metropolitan Mexicanas contemporâneas: a multiculturalidade, inequality, social and urban fragmentação, a public insegança e os projetos de Cidade confronting parties. Or artigo faz um balanço over a situação prevalecente e foi made from projetos de pesquisa two authors and da revião da literatura recente on or subject. É, therefore, um trabalho de caráter basically theoretical. In this paper we analyse a series of factors or aspects in three large contemporary Mexican cities: multi-culturality, inequality, social and urban fragmentation, public security and conflicting concepts of what the city should be. The article offers an overview of the current situation, on the basis of the authors’ own research projects and a review of recent literature on the topic. It is therefore primarily a theoretical paper.