| Competition: | Primeira Divisão |
| Season: | 1988–89 |
| Winners: | Benfica 28th title |
| Relegated: | Fafe Espinho Farense Leixões Académico de Viseu |
| Continentalcup1: | European Cup |
| Continentalcup1 Qualifiers: | Benfica (first round) |
| Continentalcup2: | Cup Winners' Cup |
| Continentalcup2 Qualifiers: | Belenenses (first round) |
| Continentalcup3: | UEFA Cup |
| Continentalcup3 Qualifiers: | F.C. Porto (first round) Boavista (first round) Sporting CP (first round) |
| Matches: | 342 |
| Total Goals: | 791 |
| League Topscorer: | Vata (16 goals) |
| Prevseason: | 1987–88 |
| Nextseason: | 1989–90 |
The 1988–89 Primeira Divisão was the 55th season of top-tier football in Portugal.
It was contested by 20 teams, and S.L. Benfica won the championship.
