The Sobaipuri were one of many indigenous groups occupying Sonora and what is now Arizona at the time Europeans first entered the American Southwest. They were a Piman or O'odham group who occupied southern Arizona and northern Sonora (the Pimería Alta) in the 15th-19th centuries. They were a subgroup of the O'odham or Pima, surviving members of which include the residents of San Xavier del Bac which is now part of the Tohono O'odham Nation and the Akimel O'odham.