| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| D | Dimitri Kevin Cavaré | 1995-02-05 | 184 | 85 | |||
| D | Ezekiel Fryers | 1992-09-09 | 183 | 75 | 2020-06-30 | ||
| D | Jason McCarthy | 1995-11-07 | 186 | 80 | 2020-06-30 | ||
| M | Lloyd Isgrove | 1993-01-12 | 178 | 72 | 2020-06-30 | ||
| F | Mamadou Thiam | 1995-03-20 | 180 | 82 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Matthew James (M) | Barnsley FC | Leicester City | Confirmed | |
| 30.Jan | Adam Armstrong (F) | Barnsley FC | Newcastle United | Confirmed | |
| 25.Jan | Matthew James (M) | Leicester City | Barnsley FC | Confirmed | |
| 30.Aug | Adam Armstrong (F) | Newcastle United | Barnsley FC | Confirmed | |
| 30.Aug | Alfie Mawson (D) | Barnsley FC | Swansea City | Confirmed | |
| 31.May | Ivan Toney (F) | Barnsley FC | Newcastle United | Confirmed | |
| 26.Mar | Ivan Toney (F) | Newcastle United | Barnsley FC | Confirmed | |
| 3.Jan | Daniel Crowley (M) | Barnsley FC | Arsenal FC | Confirmed | |
| 1.Aug | Daniel Crowley (M) | Arsenal FC | Barnsley FC | Confirmed | |
| 7.Aug | Keith Treacy (M) | Burnley FC | Barnsley FC | Confirmed |