Tlapacoyan is Barlow's Province 18. It occupies page 26 of the Matrícula and folio 50 (recto) of the Codex Mendoza.The following maps and table are all from Barlow (1949).

Location Map. Tlapacoyan is shown in green.

    Barlow's map of the Province. Tlapacoyan is located in the northern part of the State of Puebla.

 

Tributary Pueblos

1. Xicotepec#
2. Cuauhchinanco#
3. Chila#
4. Tlapacoyan
5. Xochiquauhtitlan
6. Xiloxochitlan
 
7. Acaçacatla
... Aztaapan (not located)
... Coapan (not located)
... Tuchtlan (not located)

 

Modern Location

1. Xicotepec#
2. Cuauhchinanco#
3. Chila#
4. Tlapacoya, Pue.
5. Xochicuautla, Pue.
6. Eloxochitlan, Pue., or Xilocuautla, Pue.*
7. Zacatlán, Pue.
... ?
... ?
... Toxtla, Pue. *

Key

# Town indicated as a tributary in a source other than the Codex Mendoza.

* Modern location from Castillo Farreras (1997).

? Location uncertain