| 24 Nov 11 | T. Craig Tony Craig |  MillwallMIL | → |  Leyton OrientLEY | Loan |
| 24 Nov 11 | C. Hackett Chris Hackett | MillwallMIL | → |  Exeter CityEXE | Loan |
| 23 Nov 11 | S. Lowry Shane Lowry |  Aston VillaAVL | → | MillwallMIL | Loan |
| 23 Nov 11 | S. Lowry Shane Lowry | Aston VillaAVL | → | MillwallMIL | Loan |
| 22 Nov 11 | D. Purse Darren Purse | MillwallMIL | → |  Plymouth ArgylePLY | Loan |
| 21 Nov 11 | N. Baker Nathan Baker | Aston VillaAVL | → | MillwallMIL | Loan |
| 21 Nov 11 | N. Baker Nathan Baker | Aston VillaAVL | → | MillwallMIL | Loan |
| 18 Nov 11 | Jake Goodman | MillwallMIL | → | STXStaines TownStaines Town | Loan |
| 15 Nov 11 | J. Wright Josh Wright | XXX | → | MillwallMIL | Free |
| 21 Oct 11 | D. Purse Darren Purse | MillwallMIL | → |  Yeovil TownYEO | Loan |
| 13 Oct 11 | P. Agyemang Patrick Agyemang |  Queens Park RangersQPR | → | MillwallMIL | Loan |
| 13 Oct 11 | P. Agyemang Patrick Agyemang | Queens Park RangersQPR | → | MillwallMIL | Loan |
| 26 Sept 11 | B. Howard Brian Howard |  ReadingREA | → | MillwallMIL | Loan |
| 31 Aug 11 | L. Feeney Liam Feeney |  AFC BournemouthBOU | → | MillwallMIL | Undisclosed |
| 31 Aug 11 | J. Simpson Jay Simpson |  Hull CityHUL | → | MillwallMIL | Loan |
| 08 Aug 11 | D. N'Guessan Dany N'Guessan |  Leicester CityLEI | → | MillwallMIL | Loan |
| 11 Jul 11 | M. Laird Marc Laird | MillwallMIL | → | Leyton OrientLEY | Free |
| 07 Jul 11 | J. Stewart Jordan Stewart |  FC XanthiXAN | → | MillwallMIL | Free |
| 01 Jul 11 | T. Robinson Theo Robinson | MillwallMIL | → |  Derby CountyDER | Undisclosed |
| 01 Jul 11 | R. Allsop Ryan Allsop |  West Bromwich AlbionWBA | → | MillwallMIL | Undisclosed |
| 01 Jul 11 | T. Racon Therry Racon |  Charlton AthleticCHA | → | MillwallMIL | Free |
| 01 Jul 11 | A. Grimes Ashley Grimes | MillwallMIL | → |  RochdaleROCH | Free |
| 01 Jul 11 | A. Frampton Andy Frampton | MillwallMIL | → |  GillinghamGIL | Free |
| 01 Jul 11 | R. Allsop Ryan Allsop | West Bromwich AlbionWBA | → | MillwallMIL | Undisclosed |
| 29 Jun 11 | D. Henderson Darius Henderson |  Sheffield UnitedSHU | → | MillwallMIL | Undisclosed |
| 09 Jun 11 | N. Harris Neil Harris | MillwallMIL | → |  Southend UnitedSOUT | Free |
| 08 Jun 11 | S. Morison Steve Morison | MillwallMIL | → |  Norwich CityNOR | Undisclosed |
| 31 May 11 | J. Sullivan John Sullivan | MillwallMIL | → | Charlton AthleticCHA | Free |
| 29 Mar 11 | P. O'Connor Patrick O'Connor | MillwallMIL | → | LXXLewesLewes | Loan |
| 23 Mar 11 | M. Laird Marc Laird | MillwallMIL | → |  WalsallWAL | Loan |
| 17 Mar 11 | J. Sullivan John Sullivan | MillwallMIL | → | Charlton AthleticCHA | Loan |
| 07 Mar 11 | A. Townsend Andros Townsend |  Tottenham HotspurTOT | → | MillwallMIL | Loan |
| 07 Mar 11 | A. Townsend Andros Townsend | Tottenham HotspurTOT | → | MillwallMIL | Loan |
| 25 Feb 11 | M. Rowlands Martin Rowlands | Queens Park RangersQPR | → | MillwallMIL | Loan |
| 25 Feb 11 | K. Hughes-Mason Kiernon Hughes-Mason | MillwallMIL | → | CCXChelmsford CityChelmsford City | Loan |
| 22 Feb 11 | T. Robinson Theo Robinson | MillwallMIL | → | Derby CountyDER | Loan |
| 28 Jan 11 | H. Bouazza Hamer Bouazza | XXX | → | MillwallMIL | Free |
| 27 Jan 11 | D. Shittu Dan Shittu | MillwallMIL | → | Queens Park RangersQPR | Free |
| 25 Jan 11 | C. Eastmond Craig Eastmond |  ArsenalARS | → | MillwallMIL | Loan |
| 25 Jan 11 | C. Eastmond Craig Eastmond | ArsenalARS | → | MillwallMIL | Loan |
| 24 Jan 11 | L. Grabban Lewis Grabban | MillwallMIL | → |  BrentfordBRE | Free |
| 21 Jan 11 | D. Purse Darren Purse |  Sheffield WednesdaySHW | → | MillwallMIL | Loan |
| 19 Jan 11 | J. Berthel Askou Jens Berthel Askou | Norwich CityNOR | → | MillwallMIL | Loan |
| 13 Jan 11 | T. Robinson Theo Robinson |  Huddersfield TownHUD | → | MillwallMIL | Undisclosed |
| 05 Jan 11 | J. McQuoid Josh McQuoid | AFC BournemouthBOU | → | MillwallMIL | Undisclosed |
| 05 Jan 11 | M. Laird Marc Laird | MillwallMIL | → | BrentfordBRE | Loan |
| 01 Jan 11 | Yusuf Mersin | MillwallMIL | → |  LiverpoolLIV | Undisclosed |
| 01 Jan 11 | Yusuf Mersin | MillwallMIL | → | LiverpoolLIV | Undisclosed |