| Season: | 2008–09 |
| Mgrtitle: | Head Coach |
| Chrtitle: | President |
| League Result: | 1st |
| Cup1 Result: | Winners |
| Cup3 Result: | Winners |
| League Topscorer: | Samuel Eto'o (30) |
| Season Topscorer: | Lionel Messi (38) |
| Average Home League Attendance: | 75,000 |
| Pattern B1: | _fcbarcelona0809H |
| Pattern Sh1: | _fcbarcelona0809h |
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| Socks1: | C20300 |
| Pattern B2: | _fcbarcelona0810a |
| Pattern Sh2: | _fcbarcelona0809a |
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| Pattern La3: | _barcelona0708a |
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| Caption: | FC Barcelona players celebrating their historic treble-winning campaign, 2009 |
In 2008–09, FC Barcelona started a new era with a new manager, former captain and Barcelona B coach Pep Guardiola, who led the team to the first treble in Spanish football history. After selling off high-profiled players such as Deco and Ronaldinho, Barcelona played scintillating football throughout the season, winning the Copa del Rey, La Liga, and the UEFA Champions League. This team is widely regarded as one of the greatest teams in football history.
Source : FC Barcelona
Total spending: €88M
Total income: €49.5M