Pihuamo is a town and municipality located in the state of Jalisco in Mexico. Pihuamo is a municipality located in the southeast region of t…Pihuamo is a town and municipality located in the state of Jalisco in Mexico. Pihuamo is a municipality located in the southeast region of the state of Jalisco. At one time this region belonged to another town in Jalisco known as Tzapotlán. The occupants of this town have had various origins: toltecas, zapotecas and purépechas. The purépechas arrived to that region in 1480, and they dominated the town of Tzapotlán for some years, but before the Spanish conquest they were defeated by the indigenous of Zapotlán, Zacoalco, Sayula, and Colima in the Saltpeter War.