Tlanchinol is a town and one of the 84 municipalities of Hidalgo, in central-eastern Mexico. The municipality covers an area of . The town stands on Federal Highway 105 in the mountains of the Sierra Madre Oriental.
The name comes from the Nahuatl Tlanchinolli ("burnt house") and icpac (locative of superposition); hence: "on the burnt house". An earlier form of the name was Tlanchinaltic.
The municipality was created in 1869. In the 2020 INEGI census, it reported a total population of 37,722, up from 33,694 in 2005.