| Club: | Sagan Tosu |
| Season: | 2011 |
| League: | J.League Division 2 |
| League Result: | 2nd (Promoted to J1) |
| Cup1: | Emperor's Cup |
| Cup1 Result: | Second round |
| Pattern La1: | _Sagan Tosu 2011 - 2012 HOME FP |
| Pattern B1: | _Sagan Tosu 2011 - 2012 HOME FP |
| Pattern Ra1: | _Sagan Tosu 2011 - 2012 HOME FP |
| Pattern Sh1: | _Sagan Tosu 2011 - 2012 HOME FP |
| Pattern So1: | _Sagan Tosu 2011 - 2012 HOME FP |
| Pattern La2: | _Sagan Tosu 2011 - 2012 AWAY FP |
| Pattern B2: | _Sagan Tosu 2011 - 2012 AWAY FP |
| Pattern Ra2: | _Sagan Tosu 2011 - 2012 AWAY FP |
| Pattern Sh2: | _Sagan Tosu 2011 - 2012 AWAY FP |
| Pattern So2: | _Sagan Tosu 2011 - 2012 AWAY FP |
| Prevseason: | 2010 |
| Nextseason: | 2012 |
The 2011 Sagan Tosu season was Sagan Tosu's 13th season in J.League Division 2. Sagan Tosu were promoted to the 2012 J.League Division 1. Sagan Tosu were knocked out in the second round of the 2011 Emperor's Cup.
See main article: 2011 J.League Division 2.
See main article: 2011 Emperor's Cup.