known as the capital federal, but officially Ciudad Autónoma de Buenos Aires ): 1. Buenos Aires (autonomous city) 2. Buenos Aires (province) 3. Catamarca 4. Chaco 5. Chubut 6. Córdoba 7. Corrientes 8. Entre Ríos 9. Formosa 10. Jujuy 11. La Pampa 12. La Rioja   13. Mendoza 14. Misiones 15.