Tlachichuca is one of the 217 municipalities that make up the state of Puebla, Mexico. Located in the third region of the state, had in 2005 a population of 25674 inhabitants and its HDI was in 2004 of 0.6844. Located between 19º01'36 "and 19º19'54" of north latitude and 97º10'24 "and 97º30'18" of west longitude, it limits to the north with Guadalupe Victoria, to the south with Chalchicomula and Atzitzintla, to the east with the state of Veracruz, Quimixtlán and Chilchotla and to the west with Aljojuca and San Nicolás Buenos Aires. Its head is the town of Tlachichuca, with a population of 7181 inhabitants and located at 2600 meters of altitude.
One of its attractions is the Parish of the Immaculate Conception, dating from the sixteenth century. The origin of the name has different interpretations: for some it is derived from the Nahuatl terms tlachichiuhi-qui and can, so it would mean Place of craftsmen. For others it originates in tlalli and chichiuhqui, this is the place of those who work the land. Others also propose that it derives from tlalli but also from xoxoctlic and can, which would result in a place of green earth. Finally, in the Totonac language it would be interpreted as the place where tears flow. Inhabited by Totonacos and Nahuas, after the conquest of Mexico, the town of Santa María de la Peña Tlachichuca was founded.
At that time forming part of the municipality of Tepeaca, in May of 1807 the viceroy solicitor was asked to form the legal foundation of Tlachichuca. It later integrated the district of Chalchicomula until in 1895 it was erected as an autonomous municipality. With 459.25 km² it is the 12th state municipality in order to its surface. To the northeast of the municipality is the Quimixtlán mountain range, which integrates the Sierra Madre Oriental and is covered by large amounts of volcanic material. To the southeast is the Citlaltépetl volcano. With 5747 meters above sea level it is the highest in Mexico. To its feet and to the center of the municipality are the plains of San Andrés, wide sandy surface with a depression of volcanic origin with craters of explosion like the one of Axalapasco de Aljojuca. To the northwest the plains of San Juan are located.
The sierra is a watershed: to the east the Huitzelopan, Matlalopan, Ahuatla, Acalopa, La Barranca, Tlaupa, La Junta and Puente de Viga Rivers flow into the La Antigua River or the Jamapa River, which spill their waters into the Gulf of Mexico, and to the west the rivers Valiente, El Solitario, Quetzalapa, Piedra Pintada and Pozo Buey descend to the plains where they are lost. While the Citlaltépetl keeps its summit permanently snowed, its eastern foothills present a temperate humid climate with abundant summer rains. With the exception of the twin hills of Las Derrumbadas, which have a cold climate, the remaining mountainous areas have a subhumid semi-cold climate. On the other hand, the center and north of the municipality has temperate subhumid climate with also summer rains.