The 2004 Campeonato Paulista de Futebol Profissional da Primeira Divisão - Série A1 was the 103rd season of São Paulo's top professional football league. The competition began on 18 January and ended on 21 April. São Caetano became the champions, winning the title for the first time in their history. Vágner Love was the top scorer with 12 goals.
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