| Club: | AS Saint-Étienne |
| Season: | 2005–06 |
| Chrtitle: | President |
| Chairman: | Bernard Caïazzo |
| Mgrtitle: | Head coach |
| Manager: | Élie Baup |
| Stadium: | Stade Geoffroy-Guichard |
| League: | Ligue 1 |
| League Result: | 13th |
| Cup1: | Coupe de France |
| Cup1 Result: | Round of 64 |
| Cup2: | Coupe de la Ligue |
| Cup2 Result: | Third round |
| League Topscorer: | Frédéric Piquionne (6) |
| Season Topscorer: | Frédéric Piquionne (7) |
| Highest Attendance: | 35,123 vs Marseille |
| Average Attendance: | 29,627[1] |
| Largest Win: | Saint-Étienne 3–0 Paris Saint-Germain Saint-Étienne 3–0 Le Mans |
| Largest Loss: | Sochaux 4–0 Saint-Étienne Lyon 4–0 Saint-Étienne |
| Prevseason: | 2004–05 |
| Nextseason: | 2006–07 |
The 2005–06 season was the 73rd in the history of AS Saint-Étienne and their second consecutive season in the second division. The club participated in Ligue 1 and the Coupe de France.
See main article: 2005–06 Ligue 1.
See main article: 2005–06 Coupe de France.
See main article: 2005–06 Coupe de la Ligue.