1990–91 Campionato Sammarinese di Calcio
The 1990–91 Campionato Sammarinese di Calcio season was the 6th season since its establishment. It was contested by 10 teams, and S.C. Faetano won the championship.- S.C. Faetano 3-0 S.S. Folgore/Falciano
- S.S. Juvenes 4-2 S.S. Montevito
Second round
- S.S. Folgore/Falciano 0-1 S.S. Montevito
- S.C. Faetano 2-1 S.S. Juvenes
Third round
- S.S. Juvenes 2-1 S.S. Montevito
- S.P. Tre Fiori 4-1 S.C. Faetano
Semifinal
- S.C. Faetano 3-1 S.S. Juvenes
Final
- S.C. Faetano 1-0 S.P. Tre Fiori
