| Club: | SJK |
| Season: | 2020 |
| Chairman: | Raimo Sarajärvi |
| Manager: | Jani Honkavaara |
| Stadium: | OmaSP Stadion |
| League: | Veikkausliiga |
| League Result: | 7th |
| Cup1: | Finnish Cup |
| Cup1 Result: | Sixth Round |
| League Topscorer: | Emmanuel Ledesma (5) |
| Season Topscorer: | Joonas Lepistö (6) |
| Leftarm1: | 121212 |
| Body1: | 121212 |
| Rightarm1: | 121212 |
| Shorts1: | 121212 |
| Socks1: | FFFFFF |
| Leftarm2: | FFFFFF |
| Body2: | FFFFFF |
| Rightarm2: | FFFFFF |
| Shorts2: | 121212 |
| Socks2: | FFFFFF |
| Prevseason: | 2019 |
| Nextseason: | 2021 |
The 2020 season was Seinäjoen Jalkapallokerho's 13th competitive season, and seventh in the Veikkausliiga.
| Date | Position | Nationality | Name | From | Fee | Ref. | |
|---|---|---|---|---|---|---|---|
| 1 January 2020 | GK |  | Mehdi El Moutacim | Ekenäs IF | Undisclosed | ||
| 1 January 2020 | DF | | Tero Mäntylä | HIFK | Undisclosed | ||
| 1 January 2020 | DF | | Niko Markkula | Inter Turku | Undisclosed | ||
| 1 January 2020 | MF | | Keaton Isaksson | IFK Mariehamn | Undisclosed | ||
| 1 January 2020 | MF | | Aatu Kujanpää | VPS | Undisclosed | ||
| 1 January 2020 | MF | | Robin Sid | IFK Mariehamn | Undisclosed | ||
| 1 January 2020 | MF |  | Jude Arthur | Liberty Professionals | Undisclosed | ||
| 1 January 2020 | FW |  | Ariel Ngueukam | KuPS | Undisclosed | ||
| 1 January 2020 | FW | | Serge Atakayi | Rangers | Undisclosed | ||
| 13 January 2020 | DF |  | Dárvin Chávez | FF Jaro | Undisclosed | ||
| 7 February 2020 | MF | Arjanit Krasniqi | Billericay Town | Undisclosed | [1] | ||
| 8 February 2020 | MF | Anel Rashkaj | AFC Eskilstuna | Undisclosed | [2] | ||
| 16 February 2020 | GK | | Walter Viitala | Sandefjord | Undisclosed | [3] | |
| 6 March 2020 | MF | | Matej Hradecky | TPS | Undisclosed | [4] | |
| 24 July 2020 | DF |  | Nikko Boxall | Viborg | Undisclosed | [5] | |
| 19 August 2020 | MF |  | Emmanuel Ledesma | Unattached | Free | [6] | |
| 19 August 2020 | MF | Jake Jervis | Luton Town | Undisclosed | |||
| 27 August 2020 | DF |  | Murilo | Ourense | Undisclosed | [7] |
| Date | Position | Nationality | Name | Joined | Date | Ref | |
|---|---|---|---|---|---|---|---|
| 20 July 2020 | DF | | Nadson | [8] | |||
| 7 September 2020 | MF | Arjanit Krasniqi | Braintree Town | 7 September 2020 | [9] | ||
| 16 September 2020 | FW | Billy Ions | [10] |
See main article: 2020 Veikkausliiga.
See main article: 2020 Finnish Cup.
|-|colspan="14"|U23 Players:|-|colspan="14"|Players away from the club on loan:|-|colspan="14"|Players who left SJK during the season:|}
| width=60 | Place | width=60 | Position | width=60 | Nation | width=60 | Number | width=200 | Name | width=100 | Veikkausliiga | width=100 | Finnish Cup | width=80 | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | FW | | 20 | Joonas Lepistö | 4 | 2 | 6 | ||||||||
| 2 | MF | | 9 | Emmanuel Ledesma | 5 | 0 | 5 | ||||||||
| 3 | MF | | 58 | Mehmet Hetemaj | 4 | 0 | 4 | ||||||||
| FW | | 88 | Ariel Ngueukam | 4 | 0 | 4 | |||||||||
| 5 | FW | 8 | Jake Jervis | 3 | 0 | 3 | |||||||||
| 6 | MF | | 7 | Matej Hradecky | 2 | 0 | 2 | ||||||||
| MF |  | 77 | Denys Oliynyk | 2 | 0 | 2 | |||||||||
| MF | | 18 | Niko Markkula | 1 | 1 | 2 | |||||||||
| 9 | DF | | 22 | Murilo | 1 | 0 | 1 | ||||||||
| FW | | 45 | Serge Atakayi | 1 | 0 | 1 | |||||||||
| DF | | 15 | Dárvin Chávez | 0 | 1 | 1 | |||||||||
| TOTALS | 27 | 4 | 31 | ||||||||||||
| width=60 | Place | width=60 | Position | width=60 | Nation | width=60 | Number | width=200 | Name | width=100 | Veikkausliiga | width=100 | Finnish Cup | width=80 | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | GK | | 1 | Jesse Öst | 3 | 0 | 3 | ||||||||
| 2 | GK | | 24 | Walter Viitala | 2 | 0 | 2 | ||||||||
| TOTALS | 5 | 0 | 5 | ||||||||||||
| Number | Nation | Position | Name | Veikkausliiga | Finnish Cup | Total | |||||||
| 2 | | DF | Nikko Boxall | 4 | 0 | 0 | 0 | 4 | 0 | ||||
| 3 |  | DF | Seynabou Benga | 0 | 0 | 1 | 0 | 1 | 0 | ||||
| 4 | | DF | Matias Vainionpää | 4 | 1 | 0 | 0 | 4 | 1 | ||||
| 5 | | DF | Tero Mäntylä | 5 | 1 | 2 | 0 | 7 | 1 | ||||
| 6 | | MF | Jude Arthur | 1 | 0 | 1 | 0 | 2 | 0 | ||||
| 8 | FW | Jake Jervis | 2 | 0 | 0 | 0 | 2 | 0 | |||||
| 9 | | MF | Emmanuel Ledesma | 4 | 0 | 0 | 0 | 4 | 0 | ||||
| 11 | | MF | Denys Oliynyk | 2 | 0 | 0 | 0 | 2 | 0 | ||||
| 18 | | DF | Niko Markkula | 1 | 0 | 0 | 0 | 1 | 0 | ||||
| 19 | | MF | Robin Sid | 2 | 0 | 0 | 0 | 2 | 0 | ||||
| 20 | | FW | Joonas Lepistö | 0 | 0 | 1 | 0 | 1 | 0 | ||||
| 21 | MF | Anel Rashkaj | 2 | 0 | 1 | 0 | 3 | 0 | |||||
| 22 | | DF | Murilo | 3 | 0 | 0 | 0 | 3 | 0 | ||||
| 25 | | MF | Daniel Håkans | 1 | 0 | 0 | 0 | 1 | 0 | ||||
| 27 | | MF | Aatu Kujanpää | 0 | 0 | 1 | 0 | 1 | 0 | ||||
| 31 | | MF | Keaton Isaksson | 1 | 0 | 0 | 0 | 1 | 0 | ||||
| 45 | | FW | Serge Atakayi | 3 | 0 | 1 | 0 | 4 | 0 | ||||
| 58 | | MF | Mehmet Hetemaj | 7 | 0 | 1 | 0 | 8 | 0 | ||||
| 88 | | FW | Ariel Ngueukam | 3 | 0 | 1 | 0 | 4 | 0 | ||||
| DF | Joel Laitinen | 0 | 0 | 1 | 0 | 1 | 0 | |||||
| Players who left SJK during the season: | |||||||||||||
| 30 | | DF | Nadson | 0 | 0 | 1 | 0 | 1 | 0 | ||||
| TOTALS | 45 | 0 | 12 | 2 | 57 | 2 | |||||||