In 1965, the number of inhabitants rose to 850,660, the gross urban area was estimated at 7.630ha, and the population density was estimated at 111 people per ha. Between 1970 and 1980, centrifugal forces added new urban areas Santa Catarina, Apodaca and General Escobedo- totalizing seven towns. The area had a population of 1,281,000 inhabitants. By 1970, the gross urban area was estimated at 13,000ha and the population density was estimated at 90 people per ha.
En la década de 1970-1980 de nuevo el empuje de las fuerzas centrífugas y sus componentes, adicionan las áreas urbanas de los municipios de Santa Catarina, Apodaca y General Escobedo, sumando siete los municipios metropolitanos con un total de 1,281 mil habitantes; estimándose para el año de 1970 una cantidad de 13,000 hectáreas de área urbana bruta, lo que representaba una densidad de pobladores de 90 habitantes por hectárea.