Tulancingo is the second-largest city in the Mexican state of Hidalgo. It is located in the southeastern part of the state and also forms one of the 84 municipalities of Hidalgo, as well as the Archdiocese of Tulancingo. Located 93 km from Mexico City, this area is the most important wool textile producer in the country and was home to El Santo, Mexico's most famous lucha libre wrestler, and to Gabriel Vargas (cartoonist), author of the popular cartoon La Familia Burrón. It is also home to the Huapalcalco archeological site, which was the forerunner to the Teotihuacan civilization. The name derives from the Nahuatl words “tule” and “tzintle” which mean “in or behind the reeds.” This is confirmed by its Aztec glyph.

Hidalgo, officially the Free and Sovereign State of Hidalgo, is one of the 31 states which, along with Mexico City, constitute the 32 federal entities of Mexico. It is divided into 84 municipalities and its capital city is Pachuca de Soto. It is located in east-central Mexico and is bordered by San Luis Potosí and Veracruz on the north, Puebla on the east, Tlaxcala and State of Mexico on the south and Querétaro on the west.