1989–90 League of Ireland First Division
| Season | 1989–90 |
|---|---|
| Champions | Waterford United |
| Promoted | Sligo Rovers |
| European Cup Winners' Cup | Bray Wanderers |
| Top goalscorer | John Ryan: 16 (Bray Wanderers) |
← 1988–89 1990–91 → | |
The 1989–90 League of Ireland First Division season was the fifth season of the League of Ireland First Division.