| Club: | Leyton Orient F.C. |
| Season: | 2008–09 |
| Manager: | Martin Ling Until 18 January 2009 Geraint Williams From 5 February 2009' [1] |
| League: | Football League One |
| League Result: | 14th |
| Cup1: | FA Cup |
| Cup1 Result: | Third Round |
| Cup2: | League Cup |
| Cup2 Result: | First Round |
| Cup3: | Football League Trophy |
| Cup3 Result: | Southern Second Round |
| Prevseason: | 2007–08 |
| Nextseason: | 2009–10 |
This article documents the 2008–09 season of Leyton Orient F.C.
Includes all players who were awarded squad numbers during the season.