| Club: | LASK |
| Season: | 2020–21 |
| Chrtitle: | Chairman |
| Chairman: | Siegmund Gruber |
| Mgrtitle: | Manager |
| Manager: | Valérien Ismaël |
| Stadium: | Waldstadion Linzer Stadion |
| League: | Austrian Bundesliga |
| League Result: | 4th |
| Cup1: | Austrian Cup |
| Cup1 Result: | Runners-up |
| Cup2: | UEFA Europa League |
| Cup2 Result: | Group stage |
| League Topscorer: | Johannes Eggestein (12) |
| Season Topscorer: | Johannes Eggestein (20) |
| Pattern La1: | _lask2021H |
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| Pattern La2: | _lask2021T |
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| Pattern Sh2: | _lask2021a |
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| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 season was the 113th season in the existence of LASK and the club's fourth consecutive season in the top flight of Austrian football. In addition to the domestic league, LASK participated in this season's editions of the Austrian Cup and participated in the UEFA Europa League. The season covered the period from 1 August 2020 to 30 June 2021.
See main article: 2020–21 Austrian Football Bundesliga.
The league fixtures were announced on 9 July 2020.[1]
See main article: 2020–21 Austrian Cup.
See main article: 2020–21 UEFA Europa League.
The group stage draw was held on 2 October 2020.[2]
| width=15 | width=15 | width=15 | width=15 | width=145 | Name | width=140 | Austrian Bundesliga | width=120 | Austrian Cup | width=120 | Europa League | width=100 | Total | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 17 | FW |  | Andreas Gruber | 2 | 2 | 3 | 7 | |||||||||
| 29 | FW | | Marko Raguž | 2 | 1 | 4 | 7 | ||||||||||
| 2 | 14 | MF | | Husein Balić | 2 | 1 | 2 | 5 | |||||||||
| 3 | 13 | MF | Johannes Eggestein | 2 | 1 | 1 | 4 | ||||||||||
| 4 | 18 | DF | | Gernot Trauner | 2 | 0 | 1 | 3 | |||||||||
| 10 | MF | | Peter Michorl | 0 | 1 | 2 | 3 | ||||||||||
| 5 | 26 | DF | | Reinhold Ranftl | 2 | 0 | 0 | 2 | |||||||||
| 31 | MF | | Lukas Grgic | 2 | 0 | 0 | 2 | ||||||||||
| 6 | 5 | DF | Petar Filipović | 0 | 0 | 1 | 1 | ||||||||||
| 27 | MF | | Thomas Goiginger | 1 | 0 | 0 | 1 | ||||||||||
| 33 | FW | | Thomas Sabitzer | 0 | 0 | 1 | 1 | ||||||||||
| Own goal | 0 | 0 | 1 | 1 | |||||||||||||
| Totals | 15 | 6 | 16 | 37 | |||||||||||||