| Club: | Kashiwa Reysol |
| Season: | 2011 |
| Manager: | Nelsinho Baptista |
| Mgrtitle: | Manager |
| League: | J.League Division 1 |
| League Result: | Champions |
| Cup1: | Emperor's Cup |
| Cup1 Result: | Fourth Round |
| Cup2: | J.League Cup |
| Cup2 Result: | First Round |
| Cup3: | Club World Cup |
| Cup3 Result: | 4th |
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| Prevseason: | 2010 |
| Nextseason: | 2012 |
The 2011 Kashiwa Reysol season is Kashiwa Reysol's first season in J.League Division 1 since 2009 and 39th overall in the Japanese top flight. It also includes the 2011 J.League Cup, and the 2011 Emperor's Cup.
As a result of their first J.League title win (their second overall counting the 1972 JSL title), they were participants in the 2011 FIFA Club World Cup as Japan were the tournament hosts. Their title win was the first immediate win for a second-tier champion.
See main article: 2011 J.League Division 1.
See main article: 2011 J.League Cup.
See main article: 2011 Emperor's Cup.
See main article: 2011 FIFA Club World Cup.