| Club: | AZ Alkmaar |
| Season: | 2018–19 |
| Ownertitle: | Executive director Technical director |
| Owner: | Robert Eenhoorn Max Huiberts |
| Chrtitle: | Chairman |
| Chairman: | René Neelissen |
| Mgrtitle: | Manager |
| Manager: | John van den Brom |
| Stadium: | AFAS Stadion |
| League: | Eredivisie |
| League Result: | 4th |
| Cup1: | KNVB Cup |
| Cup1 Result: | Semi-finals |
| Cup2: | UEFA Europa League |
| Cup2 Result: | Second qualifying round |
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| Prevseason: | 2017–18 |
| Nextseason: | 2019–20 |
The 2018–19 season was the 53rd season of AZ Alkmaar and the club's 21st consecutive season in the top flight of Dutch football. In addition to the domestic league, AZ Alkmaar participated in the KNVB Cup and the UEFA Europa League. The season covered the period from 1 July 2018 to 30 June 2019.
For recent transfers, see List of Dutch football transfers winter 2017–18
See main article: 2018–19 Eredivisie.
See main article: 2018–19 KNVB Cup.
See main article: 2018–19 UEFA Europa League.