1990–91 Nationalliga A
| Season | 1990–91 | 
|---|---|
| Champions | Grasshopper Club | 
| Relegated | none | 
| Top goalscorer | Dario Zuffi, Young Boys, (17 goals)  | 
← 1989–90  1991–92 →   | |
| Season | 1990–91 | 
|---|---|
| Champions | No team was declared champions | 
| Promoted | none | 
| Relegated | Chênois SC Burgdorf FC Montreux-Sports  | 
| Top goalscorer | n/a | 
← 1989–90  1991–92 →   | |
Statistics of the Swiss National League in the 1990–91 football season, both Nationalliga A and Nationalliga B.