| Club: | Atalanta B.C. |
| Season: | 2005–06 |
| Chrtitle: | President |
| Chairman: | Ivan Ruggeri |
| Mgrtitle: | Head coach |
| Manager: | Stefano Colantuono |
| Stadium: | Stadio Atleti Azzurri d'Italia |
| League: | Serie B |
| League Result: | 1st (promoted)[1] |
| Cup1: | Coppa Italia |
| Cup1 Result: | Round of 16 |
| League Topscorer: | Nicola Ventola (15) |
| Prevseason: | 2004–05 |
| Nextseason: | 2006–07 |
The 2005–06 season was the 99th season in the existence of Atalanta B.C. and the club's first season back in the second division of Italian football. In addition to the domestic league, Atalanta participated in this season's edition of the Coppa Italia.
See main article: 2005–06 Serie B.
See main article: 2005–06 Coppa Italia.