In the year 1394, a group of indigenous people came from the Pacific coast. They wanted to get to Tenochtitlan in order to attend the crowning of the emperor. On their way to their destination, these Pacific people established in Ixtapan de la Sal where they formed communities. Here they noticed that once the geothermacally heated water was evaporated naturally in the sunlight, salt was formed. This amazed them because back then, salt was a very precious item. When the emperor found out about this discovery, he also ordered men and women to move there, which led to the foundation of Ixtapan de la Sal.
At the time of the Spanish conquest, Hern�n Cort�s sent Andr�s de Tapia to conquer Ixtapan de la Sal. The first priest who came to Ixtapan was Juan Guichen de Leyva. Evangelization was carried out by Franciscans who came here after 1543. Tradition states that 13 monks came to Ixtapan de la Sal to convert the Indians by associating Christ with the local deity associated with storms.
In 1822, Ixtapan de la Sal became a municipality of the state of Mexico. In 1825, the first elections to select the municipal council took place on Sunday December 3 of the same year. On August 9 and 10, 1912, the population of Ixtapan de la Sal was attacked by �pseudo�Zapatistas�, who are followers of Zapata's ideology. The invaders were led by Andres Ruiz and Francisco B. Pacheco. On August 1, 1918, by council�s agreement, local mourning was declared for every year�s August 10
