| Competition: | Campeonato Carioca |
| Season: | 2004 |
| Winners: | Flamengo |
| Relegated: | Bangu |
| Continentalcup1: | Copa do Brasil |
| Continentalcup1 Qualifiers: | Americano América Friburguense |
| Continentalcup2: | Série C |
| Continentalcup2 Qualifiers: | Americano América Friburguense Portuguesa |
| League Topscorer: | Valdir (Vasco da Gama) - 14 goals |
| Biggest Home Win: | Flamengo 5-1 Madureira (February 11, 2004) Vasco da Gama 5-1 Cabofriense (March 4, 2004) América 5-1 Bangu (March 21, 2004) |
| Biggest Away Win: | Fluminense 0-4 Vasco da Gama (March 7, 2004) |
| Highest Scoring: | Flamengo 4–3 Fluminense (February 1, 2004) América 4-3 Flamengo (February 8, 2004) |
| Matches: | 74 |
| Total Goals: | 206 |
| Prevseason: | 2003 |
| Nextseason: | 2005 |
The 2004 edition of the Campeonato Carioca kicked off on January 24 and ended on April 18, 2004. It is the official tournament organized by FFERJ (Federação de Futebol do Estado do Rio de Janeiro, or Rio de Janeiro State Football Federation. Only clubs based in the Rio de Janeiro State are allowed to play. Twelve teams contested this edition. Flamengo won the title for the 28th time. Bangu was relegated, ending a string of 90 consecutive participations in the Carioca championship.[1] [2]
The tournament was divided in two stages: