| Club: | AS Trenčín |
| Season: | 2020–21 |
| Chairman: |  Róbert Rybníček |
| Manager: |  Stijn Vreven (until 27 April) Juraj Ančic (interim) Peter Hlinka (from 2 June)[1] |
| Owner: | Tscheu La Ling |
| Stadium: | Štadión pod Dubňom[2] Štadión na Sihoti |
| League: | Fortuna liga |
| League Result: | 6th |
| Cup1: | Slovak Cup |
| Cup1 Result: | Quarter-final |
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| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 AS Trenčín season is the club's 21st season in the Slovak Super Liga and 10th consecutive. AS Trenčín participated in the Fortuna Liga and Slovak Cup.
In pre-season club changes manager. Juraj Ančic was replaced by Stijn Vreven.[3] In this season, after two and a half years AS Trenčín will return on a reconstructed home stadium Štadión na Sihoti. Autumn rounds of a league was played on Štadión pod Dubňom in a city Žilina. Spring matches will be played in Trenčín.[4] On April 27 Stijn Vreven ended in AS Trenčín.[5]
In this season AS changes club's logo. Previous logo missed historical value, reference to AS Trenčín's traditions and also right color combination. New edition contain letter "T" with dynamic design. New logo is connected with returning on the new stadium.[6]
| Entry date | Position | No. | Player | From | Ref. | |
|---|---|---|---|---|---|---|
| 29 June 2020 | DF | 66 |  Juha Pirinen |  Tromsø IL | [7] | |
| 13 July 2020 | FW | 9 |  Eduvie Ikoba |  Zalaegerszegi TE | [8] | |
| 19 July 2020 | MF | 13 |  Philip Azango | KAA Gent | [9] | |
| 1 August 2020 | DF | 35 | Reuben Yem | KAA Gent | [10] | |
| 19 December 2020 | FW | 28 | Matúš Kmeť | MFK Ružomberok | [11] | |
| 28 December 2020 | MF | 26 |  Joseph Amoah | Vitória S.C. | [12] | |
| MF | 30 | Rahim Ibrahim | ||||
| 29 December 2020 | MF | 18 | Samuel Lavrinčík | Slovan Bratislava U21 | [13] | |
| 30 December 2020 | MF | 23 | Adam Gaži | AS Trenčín U19 | [14] | |
| 7 March 2021 | DF | 3 |  Ramón |  FC Wacker Innsbruck B | [15] |
| Date | Position | Player | To | Ref. | |
|---|---|---|---|---|---|
| 7 July 2020 | DF |  Keston Julien | FC Sheriff Tiraspol | [17] | |
| MF | Mohammed Lamine | U.D. Oliveirense | |||
| 31 July 2020 | GK | Adrián Chovan | FC ViOn Zlaté Moravce | [18] | |
| 17 August 2020 | FW | Gino van Kessel |  Olympiakos Nicosia | [19] | |
| 5 September 2020 | FW | Osman Bukari | KAA Gent | [20] | |
| 30 October 2020 | DF | Cole Kpekawa | Chelmsford City F.C. | [21] | |
| 17 December 2020 | FW | David Depetris | End of a contract | [22] | |
| DF | Marián Pišoja | ||||
| February 2021 | FW | Joseph Amoah | No Club |
| Date | Position | Player | To | End date | Ref. |
|---|---|---|---|---|---|
| 29 July 2020 | FW | Michal Petráš | FK Dubnica | 30 June 2021 | [23] |
| 17 January 2021 | MF | Tomislav Knežević | NK Rudeš | 30 June 2021 | [24] |
| FW |  Ivenzo Comvalius | NK Dugopolje | 30 June 2021 |
See main article: 2020–21 Slovak First Football League.
See main article: 2020–21 Slovak Cup.
|-! colspan=14 style="background:#dcdcdc; text-align:center| Goalkeepers|-! colspan=14 style="background:#dcdcdc; text-align:center| Defenders|-! colspan=14 style="background:#dcdcdc; text-align:center| Midfielders |-! colspan=14 style="background:#dcdcdc; text-align:center| Forwards|-! colspan=14 style="background:#dcdcdc; text-align:center| Players transferred out during the season|}
| width=15 | width=15 | width=15 | width=180 | Name | width=120 | Fortuna Liga | width=120 | Slovak Cup | width=120 | Total | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 7 | MF |  Hamza Čataković | 12 | 0 | 12 | |||||||
| 2 | 9 | FW | Eduvie Ikoba | 5 | 1 | 3 | |||||||
| 14 | MF | Milan Corryn | 4 | 1 | |||||||||
| 4 | 15 | FW | Ahmad Ghali | 4 | 0 | 4 | |||||||
| 16 | FW | Jakub Kadák | 2 | 2 | |||||||||
| 6 | 10 | MF | Ante Roguljić | 2 | 0 | 2 | |||||||
| 17 | FW | Lucas Demitra | 2 | 0 | |||||||||
| 8 | 34 | MF | Aschraf El Mahdioui | 1 | 0 | 1 | |||||||
| 4 | MF | Abdul Zubairu | 1 | 0 | |||||||||
| 11 | FW | Osman Bukari | 1 | 0 | |||||||||
| 29 | DF | Ruben Ligeon | 1 | 0 | |||||||||
| 66 | DF | Juha Pirinen | 1 | 0 | |||||||||
| 71 | FW | Adam Tučný | 1 | 0 | |||||||||
| Own goals | 3 | 0 | 2 | ||||||||||
| Totals | 38 | 3 | 41 | ||||||||||