| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | David Forde | 1979-12-20 | 187 | 85 | |||
| D | Danny Shittu | 1980-09-02 | 191 | 96 | 2013 | ||
| D | Darren Ward | 1978-09-13 | 191 | 91 | |||
| D | Jack Smith | 1983-10-14 | 180 | 78 | |||
| D | Paul Robinson | 1982-01-07 | 188 | 81 | |||
| D | Scott Barron | 1985-09-02 | 178 | 72 | 2013 | ||
| D | Tamika Mkandawire | 1983-05-28 | 183 | 78 | |||
| D | Tony Craig | 1985-04-20 | 185 | 79 | |||
| M | Andros Townsend | 1991-07-16 | 182 | 76 | 2021-06-30 | ||
| M | Craig Eastmond | 1990-12-09 | 173 | 75 | |||
| M | Danny Schofield | 1980-04-10 | 178 | 76 | |||
| M | James Henry | 1989-06-10 | 182 | 77 | |||
| M | Jason Puncheon | 1986-06-26 | 173 | 71 | 2019-06-30 | ||
| M | Nadjim Abdou | 1984-07-13 | 175 | 70 | |||
| F | Kevin Lisbie | 1978-10-17 | 178 | 69 | |||
| F | Lewis Grabban | 1988-01-12 | 183 | 78 | 2019-06-30 | ||
| F | Neil Harris | 1977-07-12 | 178 | 78 | |||
| F | Steve Morison | 1983-08-29 | 188 | 85 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Chris Taylor (M) | Millwall FC | Blackburn Rovers | Confirmed | |
| 17.Mar | Chris Taylor (M) | Blackburn Rovers | Millwall FC | Confirmed | |
| 23.Jan | Shane Ferguson (M) | Millwall FC | Newcastle United | Confirmed | |
| 9.Nov | Shane Ferguson (M) | Millwall FC | Newcastle United | Confirmed | |
| 7.Aug | Shane Ferguson (M) | Newcastle United | Millwall FC | Confirmed | |
| 7.Aug | Shane Ferguson (M) | Newcastle United | Millwall FC | Rumour | |
| 2.Feb | Jordan Archer (GK) | Tottenham Hotspur | Millwall FC | Confirmed | |
| 26.Jan | Jos Hooiveld (D) | Southampton FC | Millwall FC | Confirmed | |
| 12.Jan | Shaun Cummings (D) | Reading FC | Millwall FC | Confirmed | |
| 7.Jan | Scott Malone (D) | Millwall FC | Cardiff City | Confirmed |