| Competition: | Campeonato Paulista – Série A1 |
| Season: | 1984 |
| Winners: | Santos |
| Continentalcup1: | Taça de Ouro |
| Continentalcup1 Qualifiers: | Ponte Preta |
| Continentalcup2: | Taça de Prata |
| Continentalcup2 Qualifiers: | América Marília |
| League Topscorer: | Serginho Chulapa (Santos) Chiquinho (Botafogo) – 16 goals |
| Biggest Home Win: | Ponte Preta 5-0 XV de Piracicaba (October 24, 1984) |
| Biggest Away Win: | São Bento 0-3 Santos (July 18, 1984) XV de Jaú 0-3 Ponte Preta (July 25, 1984) Inter de Limeira 0-3 Botafogo (August 5, 1984) Taubaté 0-3 Santos (August 12, 1984) Ferroviária 1-4 Ponte Preta (August 22, 1984) Comercial 0-3 Santos (October 14, 1984) Santo André 1-4 Taubaté (October 21, 1984) Comercial 0-3 Palmeiras (November 10, 1984) Taquaritinga 0-3 São Paulo (November 15, 1984) Juventus 0-3 Botafogo (November 24, 1984) |
| Highest Scoring: | Corinthians 5-1 Portuguesa (July 29, 1984) Guarani 5-1 Botafogo (August 19, 1984) Santos 4-2 Juventus (August 22, 1984) Comercial 5-1 Taquaritinga (September 19, 1984) Ponte Preta 4-2 Ferroviária (October 28, 1984) |
| Matches: | 380 |
| Total Goals: | 781 |
| Prevseason: | 1983 |
| Nextseason: | 1985 |
The 1984 Campeonato Paulista da Primeira Divisão de Futebol Profissional da Série A1[1] was the 83rd season of São Paulo's top professional football league. Santos won the championship for their 15th Campeonato Paulista title. Noroeste and Marília were relegated.[2]
The twenty teams of the championship would all play twice against each other, with the team with the most points being champions, and the bottom two teams being relegated.