The history of the city of Coatzacoalcos dates back to ancient times, long before the arrival of Europeans. This region in southern Mexico is considered one of the cradles of the Olmec civilization, which flourished here from approximately 1500 to 400 BC. The name "Coatzacoalcos" itself comes from the Nahuatl language and translates to "the place where the snake hides." According to legend, it was here that the great god Quetzalcoatl sailed away on a raft of snakes, promising to return one day.
A key factor in the settlement's establishment and development has always been its strategic geographical position. Located at the mouth of the mighty Coatzacoalcos River, which flows into the Gulf of Mexico, the city has historically served as an important transportation and trade hub. The river provided a convenient route for trade between the coastal and inland areas of the Isthmus of Tehuantepec. This feature did not go unnoticed after the Spanish conquest.
The modern history of the city began in 1522 when, by order of Hernán Cortés, his companion Gonzalo de Sandoval founded one of the first Spanish settlements on the coast—Villa del Espíritu Santo. Over the centuries, the port played an important role in regional trade. In 1900, it was renamed Puerto México, and in 1936, its historical name, Coatzacoalcos, was restored. While the early economy focused on trade, the petrochemical industry became the key sector in the 20th century, defining the city's modern industrial character.