| Competition: | Campeonato Brasileiro Série B |
| Season: | 2011 |
| Winners: | Portuguesa (1st title) |
| Promoted: | Portuguesa Náutico Ponte Preta Sport |
| Relegated: | Icasa Vila Nova Salgueiro Duque de Caxias |
| Matches: | 380 |
| Total Goals: | 1012 |
| League Topscorer: | 21 goals: Kieza |
| Biggest Home Win: | Ponte Preta 5–0 ASA de Arapiraca (May 21, 2011) Portuguesa 5–0 Bragantino (June 17, 2011) |
| Biggest Away Win: | ABC 0–5 Bragantino (August 30, 2011) |
| Highest Scoring: | 8 goals: Bragantino 5–3 Salgueiro (August 13, 2011) Salgueiro 3–5 Icasa (August 16, 2011) Duque de Caxias 2–6 Bragantino (November 4, 2011) |
| Prevseason: | 2010 |
| Nextseason: | 2012 |
In 2011, the Campeonato Brasileiro Série B, the second level of the Brazilian League, will be contested by 20 clubs from May 20 until November 26, 2011.[1] Top four teams in the table will qualify to the Campeonato Brasileiro Série A to be contested in 2012, meanwhile the bottom four will be relegated to Série C next season.
For the sixth consecutive season, the tournament will be played in a double round-robin system. The team with the most points will be declared champions. Top four clubs will ascend to Série A, meanwhile the bottom four will be relegated to Série C.