The 1957 Campeonato Argentino de Rugby was won by the selection of Capital that beat in the final the selection of Buenos Aires Province ("Provincia").
Rugby Union in Argentina in 1957
The Buenos Aires Championship was won by C.A.S.I. The Cordoba Province Championship was won by Universitario The North-East Championship was won by Natación y Gimnasia
Knock out stages
Semifinals
Provincia: J. Olazábal, R. Faldutti, J. Campos, J. Berro García, J. Ramallo, M. Guyot, E. Holmgren, J. Madero, E. Mitchelstein, R. Ochoa, E. Parola, R. Dell'Acqua, F. Tosato, R. Santángelo, C. Travaglini La Plata: C. Sabalzagaray, E. Vergara, H. Tiribelli, E. Brea, H. Zapettini, N. Dutil, J. Dubarry, R. La Rosa, H. Carnicero, C. Sacerdote, J. Roan, C. Olivera, R. Giner, H. Dentone, L. Gorostiaga
Capital: J. Genoud, E. Horan, R. Raimundez, E. Fernández del Casal, A. Ricciardello, R. Bazán, P. Felisari, S. Hogg, A. Bublath, M. Azpiroz, J. Diez, A. Dillon, E. Gaviña, C. Ezcurra, E. Hirsch. Rosario: F. Cavallo, R. Abalos, G. Recagno, J. Arce, A. Drincovich, A. Robson, R. Conti, C. Kaden, J. Ramos, E. Celentano, A Colla, J. Silvetti, C. Silvestre, F. Alonso, R. Alonso
Final
Capital: J. Genoud, J. Ricciardello, R. Raimundez, E. Fernández del Casal, E. Horan, R. Bazán, P. Felisari, S. Hogg, A. Bublath, G. Schon, J. Diez, A. Dilon, E. Gaviña, C. Ezcurra, E. Hirsch Provincia: J. Olazábal, R. Faldutti, J. Campos, J. Berro García, C. Ra¬mallo, M. Guyot, E. Holmgren, J. Madero, E. Mitchelstein, R. Ochoa, E. Parola, R. Dell'Acqua, F. Tosato, R. Saitángelo, C. Travaglini.