Fagus mexicana, the Mexican Beech or Haya, is a species of beech endemic to northeastern and central Mexico, where it occurs from southwest Tamaulipas south to Hidalgo and Puebla. It is restricted to high altitude cloud forests in the Sierra Madre Oriental. It is closely related to the American Beech Fagus grandifolia, and is usually treated as Fagus grandifolia subsp. mexicana (Martínez) E.Murray.