Ciudad López Mateos (most commonly called "Atizapán") is a city in State of Mexico, Mexico, and the municipal seat of the municipality called Atizapán de Zaragoza. The city was previously named San Francisco Atizapán, but the official name was changed after president Adolfo López Mateos, who was born in that town. However, the city is still commonly known as Atizapán. There were 489,160 inhabitants according to the 2010 census. It is the seventh-largest city in the state. It includes the upscale neighborhood Zona Esmeralda.
This was the hometown of Mexican president Adolfo López Mateos, and a mausoleum was built for his remains in downtown Atizapán de Zaragoza.
Three rivers have their waterway across Atizapán: Tlalnepatla River, San Javier River and Moritas River, all of them located north of the municipality.