Mescalero or Mescalero Apache (Mescalero-Chiricahua: Naa'dahéńdé) is an Apache tribe of Southern Athabaskan–speaking Native Americans. The tribe is federally recognized as the Mescalero Apache Tribe of the Mescalero Apache Reservation, located in south-central New Mexico.

In the 19th century, the Mescalero opened their reservation to other Apache tribes, such as the Mimbreno (Chíhéńde, Warm Springs Apaches) and the Chiricahua (Shá’i’áńde or Chidikáágu). Some Lipan Apache (Tú’édįnéńde and Túntsańde) also joined the reservation. Their descendants are enrolled in the Mescalero Apache Tribe.