Santa Ana Formation may refer to: Santa Ana Formation, Mexico, an Early Miocene geologic formation in Mexico Santa Ana Formation, Antofagasta, an Early Cretaceous geologic formation in Antofagasta, Chile Santa Ana Formation, Tierra del Fuego, a Maastrichtian geologic formation in Tierra del Fuego, Chile Santa Ana limestone, a member of the Cañón de Caballeros Formation in Mexico