1990–91 League of Ireland First Division
| Season | 1990–91 | 
|---|---|
| Champions | Drogheda United | 
| Promoted | Bray Wanderers | 
| Top goalscorer | Jim Barr:12 (Monaghan United) Con McLoughlin:12 (Finn Harps)  | 
← 1989–90  1991–92 →   | |
The 1990–91 League of Ireland First Division season was the sixth season of the League of Ireland First Division.