| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | Rene Gilmartin | 1987-05-31 | 196 | 85 | 2018-06-30 | ||
| F | Marvin Sordell | 1991-02-17 | 177 | 79 | 2017-06-30 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Glen Kamara (M) | Colchester United | Arsenal FC | Confirmed | |
| 18.Nov | George Moncur (M) | West Ham United | Colchester United | Confirmed | |
| 8.Aug | George Moncur (M) | West Ham United | Colchester United | Confirmed | |
| 24.Nov | Tom Aldred (D) | Colchester United | Torquay United | Confirmed | |
| 4.Nov | Casey Thomas (F) | Swansea City | Colchester United | Confirmed | |
| 31.Mar | Freddie Ladapo (F) | Colchester United | Chelmsford City FC | Confirmed | |
| 17.Mar | Tommy Smith (D) | Ipswich Town | Colchester United | Confirmed | |
| 25.Feb | Medy Elito (F) | Colchester United | Cheltenham Town | Confirmed | |
| 1.Oct | Tom Williams (M) | Bristol City | Colchester United | Confirmed | |
| 14.Sep | Liam Henderson (F) | Watford FC | Colchester United | Confirmed |