Chalco de Díaz Covarrubias (Nahuatl pronunciation: [ɕaɫko]) is a city that is municipal seat of the surrounding municipality of Chalco. It lies in the eastern part of the State of Mexico just east of the Federal District of Mexico and is considered part of the Mexico City metropolitan area.
Chalco name is Nahuatl, and comes from Challi: "lake edge", and Co: "place" therefore both words together mean "on the edge of the lake".The municipal head, bears the surname of Diaz Covarrubias, in honor of Juan Díaz Covarrubias, one of the practitioners of medicine who was heroically shot in Tacubaya in 1859.