| Club: | AZ |
| Season: | 2009–10 |
| Manager: | Ronald Koeman (until 5 December) Martin Haar (caretaker, from 5 December to 10 December) Dick Advocaat (from 10 December) |
| Stadium: | DSB Stadion |
| League: | Eredivisie |
| League Result: | 5th |
| Cup1: | KNVB Cup |
| Cup1 Result: | Fourth round |
| Cup2: | Johan Cruyff Shield |
| Cup2 Result: | Winners |
| Cup3: | UEFA Champions League |
| Cup3 Result: | Group stage |
| League Topscorer: | Mounir El Hamdaoui (20) |
| Season Topscorer: | Mounir El Hamdaoui (23) |
| Pattern La1: | _redborder |
| Pattern B1: | _collarwhite |
| Pattern Ra1: | _redborder |
| Leftarm1: | FFFFFF |
| Body1: | FF0000 |
| Rightarm1: | FFFFFF |
| Shorts1: | FFFFFF |
| Socks1: | FFFFFF |
| Prevseason: | 2008–10 |
| Nextseason: | 2010–11 |
The 2009–10 season was Alkmaar Zaanstreek's 43rd competitive season, 12th consecutive season in the Eredivisie and 43rd year in existence as a football club. In addition to the domestic league, AZ participated in this season's editions of the KNVB Cup, Johan Cruyff Shield and UEFA Champions League.
Source: [1]
See main article: 2009 Johan Cruyff Shield.
AZ, as Eredivisie winners in the previous season, played against Heerenveen in the 2009 Johan Cruyff Shield, who themselves won the KNVB Cup.
See main article: 2009–10 Eredivisie.
See main article: 2009–10 KNVB Cup.
See main article: 2009–10 UEFA Champions League.