The municipality of Tlanchinol is one of the eighty-four municipalities that make up the state of Hidalgo in Mexico. Whose municipal seat is the town of Tlanchinol. The municipality is located to the north of the Hidalgo territory between the parallels 20°54 'and 21°12' north latitude. The meridians 98°30 'and 98°45' west longitude. With an altitude between 200 and 1900 meters above sea level, this municipality has an area of 392.11 km2, and represents 1.88% of the state's surface, within the geographical region known as Sierra Alta. It borders to the north with the state of San Luis Potosí and the municipalities of San Felipe Orizatlán and Huejutla de Reyes. To the east with the municipalities of Huejutla de Reyes and Huazalingo.
To the south with the municipalities of Calnali and Lolotla. To the west with the municipality of Lolotla.