Chalco

Chalco may refer to:
 * Chalco de Díaz Covarrubias, or simply Chalco, seat of the municipality of Chalco, State of México
 * Chalco (altépetl), an altépetl or pre-Columbian city-state in central Mexico
 * Lake Chalco, endorheic lake formerly located in the Valley of Mexico
 * Chalco, Nebraska in northern Sarpy County, Nebraska, United States
 * Chalco Hills Recreation Area in Nebraska
 * Valle de Chalco Solidaridad, a municipality located in State of Mexico, Mexico
 * Chalco, Aluminum Corporation of China Limited
 * The Chalco system in A. A. Attanasio's The Last Legends of Earth