thumb|right|250px|Mexican woman from Ajuchitlán del Progreso, a Nahua area, (2021). A metropolitan area in Mexico is defined as a group of municipalities that heavily interact with each other, usually around a core city.CONAPO Áreas Metropolitanas In 2004, a joint effort between CONAPO, INEGI and the Ministry of Social Development (SEDESOL) agreed to define metropolitan areas as either: a group of two or more municipalities in which a city with a population of at least 50,000 is located whose urban area extends over the limit of the municipality that originally contained the core city incorporating either physically or under its area of direct influence other adjacent predominantly urban municipalities all of which have a high degree of social and economic integration or are relevant for urban politics and administration; or a single municipality in which a city of a population of at least one million is located and fully contained, (that is, it does not transcend the limits of a single municipality); or a city with a population of at least 250,000 which forms a conurbation with other cities in the United States of America.
thumb|right|250px|Mexican woman from Ajuchitlán del Progreso, a Nahua area, (2021) A metropolitan area in Mexico is defined as a group of municipalities that heavily interact with each other, usually around a core city.CONAPO Áreas Metropolitanas In 2004, a joint effort between CONAPO, INEGI and the Ministry of Social Development (SEDESOL) agreed to define metropolitan areas as either: a group of two or more municipalities in which a city with a population of at least 50,000 is located whose urban area extends over the limit of the municipality that originally contained the core city incorporating either physically or under its area of direct influence other adjacent predominantly urban municipalities all of which have a high degree of social and economic integration or are relevant for urban politics and administration; or a single municipality in which a city of a population of at least one million is located and fully contained, (that is, it does not transcend the limits of a single municipality); or a city with a population of at least 250,000 which forms a conurbation with other cities in the United States of America.