The Maya Codex of Mexico (MCM) is a Maya screenfold codex manuscript of a pre-Columbian type. Long known as the Grolier Codex or Sáenz Codex, in 2018 it was officially renamed the Códice Maya de México (CMM) by the National Institute of Anthropology and History of Mexico. It is one of only four known extant Maya codices, and the only one that still resides in the Americas.

Maya codices are folding books written by the pre-Columbian Maya civilization in Maya hieroglyphic script on Mesoamerican bark paper. The folding books are the products of professional scribes working under the patronage of deities such as the Tonsured Maize God and the Howler Monkey Gods. The codices have been named for the cities where they eventually settled. The Dresden codex is generally considered the most important of the few that survive.