Auca or AUCA may refer to:
Auca (titular diocese), the former Catholic bishopric of (Villafranca Montes de) Oca in Spain, now a Latin titular see A pejorative name for the native Huaorani people in Ecuador Operation Auca, an endeavor to evangelize the Huaorani tribe Auca (genus), a genus of butterflies in the subfamily Satyrinae of the family Nymphalidae Auca (cartoon), a Catalan genre of story in pictures Sociedad Deportiva Aucas, a football club from Quito, Ecuador
AUCA as an acronym Adventist University of Central Africa American University of Central Asia