| Tourney Name: | Torneo Mondiale di Calcio Coppa Carnevale |
| Year: | 1957 |
| Other Titles: | 9° Torneo di Viareggio |
| City: | Viareggio |
| Country: | Italy |
| Num Teams: | 8 |
| Champion Other: |  Milan |
| Second Other: | Roma |
| Third Other: | Udinese |
| Fourth Other: | U.C. Sampdoria |
| Matches: | 12 |
| Goals: | 35 |
| Prevseason: | 1956 |
| Nextseason: | 1958 |
The 1957 winners of the Torneo di Viareggio (in English, the Viareggio Tournament, officially the Viareggio Cup World Football Tournament Coppa Carnevale), the annual youth football tournament held in Viareggio, Tuscany, are listed below.
The 8 teams are organized in knockout rounds. The round of 8 are played in two-legs, while the rest of the rounds are single tie.