| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| D | Cian Bolger | 1992-03-12 | 193 | ||||
| D | Stephen Hendrie | 1995-01-08 | 178 | 67 | |||
| M | Franck Moussa | 1989-07-24 | 174 | 74 | |||
| M | Michael Kightly | 1986-01-24 | 173 | 71 | 2020-06-30 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Adam King (M) | Southend United | Swansea City | Confirmed | |
| 30.Jun | Ryan Inniss (D) | Southend United | Crystal Palace | Confirmed | |
| 31.Aug | Ryan Inniss (D) | Crystal Palace | Southend United | Confirmed | |
| 6.Aug | Adam King (M) | Swansea City | Southend United | Confirmed | |
| 30.Jun | Cian Bolger (D) | Bury FC | Southend United | Confirmed | |
| 1.Jun | Luke O'Neill (D) | Southend United | Burnley FC | Confirmed | |
| 31.May | Jamar Loza (F) | Southend United | Norwich City | Confirmed | |
| 31.May | Piotr Malarczyk (D) | Southend United | Ipswich Town | Confirmed | |
| 30.Mar | Franck Moussa (M) | Free Agent | Southend United | Confirmed | |
| 26.Mar | Piotr Malarczyk (D) | Ipswich Town | Southend United | Confirmed |