| Competition: | Primeira Divisão |
| Season: | 1991–92 |
| Winners: | Porto 12th title |
| Relegated: | Torreense Penafiel União da Madeira |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Porto (first round) |
| Continentalcup2: | Cup Winners' Cup |
| Continentalcup2 Qualifiers: | Boavista (first round) |
| Continentalcup3: | UEFA Cup |
| Continentalcup3 Qualifiers: | Benfica (first round) Sporting CP (first round) Vitória de Guimarães (first round) |
| League Topscorer: | Ricky (30 goals) |
| Biggest Home Win: | Torreense 8–1 Estoril (2 May 1992) |
| Biggest Away Win: | União da Madeira 1–5 Sporting CP (22 February 1992) |
| Highest Scoring: | Torreense 8–1 Estoril (2 May 1992) |
| Matches: | 306 |
| Total Goals: | 692 |
| Prevseason: | 1990–91 |
| Nextseason: | 1992–93 |
The 1991–92 Primeira Divisão was the 58th edition of top flight of Portuguese football. It started on 18 August 1991 with a match between Desp. Chaves and Estoril, and ended on 16 May 1992. The league was contested by 18 clubs with Benfica as the defending champions.
Porto qualified for the 1992–93 UEFA Champions League first round, Boavista qualified for the 1992–93 European Cup Winners' Cup first round, and Benfica, Sporting CP and Vitória de Guimarães qualified for the 1992–93 UEFA Cup first round; in opposite, Torreense, Penafiel and União da Madeira were relegated to the Liga de Honra. Ricky was the top scorer with 30 goals.
Tirsense, Vitória de Setúbal, Estrela da Amadora, Belenenses and Nacional were consigned to the Liga de Honra following their final classification in 1990-91 season where five teams were relegated due to the reduction of teams.
The other five teams were replaced by Paços de Ferreira, Estoril and Torreense from the Liga de Honra.
| Team | Outgoing manager | Date of vacancy | Position in table | Incoming manager | Date of appointment | |
|---|---|---|---|---|---|---|
| Braga | Carlos Garcia | 8 December 1991 | 12th | José Manuel Gouveia | 9 December 1991 | |
| Sporting |  Marinho Peres | 8 March 1992 | 3rd | Dominguez | 9 March 1992 | |
| Famalicão |  Josip Skoblar | 8 March 1992 | 16th |  Prof. Neca | 9 March 1992 | |
| Braga | José Manuel Gouveia | 29 March 1992 | 11th | Vítor Manuel | 30 March 1992 | |
| Penafiel | Vítor Manuel | 29 March 1992 | 16th | Henrique Calisto | 30 March 1992 |
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Ricky | Boavista | 30 |
| 2 | Jorge Cadete | Sporting | 25 |
| 3 |  Ziad | Vitória de Guimarães | 15 |
 Chiquinho Conde | Braga | ||
| 5 | Isaías | Benfica | 12 |
| 6 | Menad | Famalicão | 11 |
| Rosário | Torreense | ||
| 8 | Spasov | Paços de Ferreira | 10 |
| Edmilson | Marítimo | ||
| Rudi | Chaves | ||
| Kostadinov | Porto |
