The 1991 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 24 teams are seeded in 6 knockout groups. The winner of each group and two lucky losers progress to the final knockout stage. The final round matches include 30 minutes extra time and penalties to be played if the draw between teams still holds. The semifinals losing sides play consolation final. The winning teams play the final with extra time and repeat the match if the draw holds.