Castillo de Teayo Municipality is a municipality of the Mexican state of Veracruz. It is located in the state's Huasteca Baja region. The municipal seat is the village of Castillo de Teayo. In the 2005 INEGI Census, the municipality reported a total population of 18,424 (down from 19,335 in 1995), of whom 4,159 lived in the municipal seat. Of the municipality's inhabitants, 1,970 (10.52%) spoke an indigenous language, primarily Nahuatl. The municipality of Castillo de Teayo covers a total surface area of 447.46 km².

Name

"Teayo" comes from the Nahuatl te-ayo-k, which means "tortoise atop stone". This is a reference to the archaeological site known as the Castle of Teayo, a syncretic blend of the Toltec, Mexica, and Huastec cultures.

Settlements