| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| D | Ricardinho | 1984-09-09 | 168 | 73 | |||
| M | Ivo Pekalski | 1990-11-03 | 180 | 78 | 2018-12-31 | ||
| M | Ryan Ledson | 1997-08-19 | 175 | 69 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Nov | Ivo Pekalski (M) | Halmstads BK | Oxford United | Confirmed | |
| 18.Jul | Ivo Pekalski (M) | Oxford United | Halmstads BK | Confirmed | |
| 31.May | Jack Payne (M) | Oxford United | Huddersfield Town | Confirmed | |
| 8.Aug | Ivo Pekalski (M) | Halmstads BK | Oxford United | Confirmed | |
| 25.Aug | Ryan Ledson (M) | Everton FC | Oxford United | Confirmed | |
| 7.Jul | Kemar Roofe (M) | Oxford United | Leeds United | Confirmed | |
| 13.Dec | Matthew Fletcher (F) | Free Agent | Oxford United | Confirmed | |
| 24.Nov | Lewis Guy (F) | Milton Keynes Dons | Oxford United | Confirmed | |
| 16.Nov | Robert Hall (F) | West Ham United | Oxford United | Confirmed | |
| 21.Oct | Danny Philliskirk (M) | Sheffield United | Oxford United | Confirmed |