| Castillo de Teayo | |
| Settlement Type: | Municipality |
| Pushpin Map: | Mexico |
| Pushpin Label Position: | above |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Mexico |
| Subdivision Type: | Country |
| Subdivision Name: |  Mexico |
| Subdivision Type1: | State |
| Subdivision Name1: | Veracruz |
| Subdivision Type2: | Municipal seat |
| Leader Title: | Municipal President |
| Leader Name: | Martin Rafael Rodríguez González (2008-10) |
| Established Title2: | Municipality created |
| Established Date2: | 13 December 1877[1] |
| Area Total Km2: | 447.46 |
| Population As Of: | 2005 |
| Population Total: | 18424 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 20.75°N -97.6333°W |
| Elevation M: | 80 |
| Postal Code Type: | Postal code |
| Website: | Castillo de Teayo |
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.[2] 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.
"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.