| 23 Nov 11 | R. Gilmartin Rene Gilmartin |  WatfordWAT | → |  Yeovil TownYEO | Loan |
| 28 Oct 11 | N. Nosworthy Nyron Nosworthy |  SunderlandSUN | → | WatfordWAT | Loan |
| 28 Oct 11 | N. Nosworthy Nyron Nosworthy | SunderlandSUN | → | WatfordWAT | Loan |
| 27 Oct 11 | B. Dale Ben Dale | WatfordWAT | → |  BrentfordBRE | Loan |
| 24 Oct 11 | C. Beattie Craig Beattie |  Swansea CitySWA | → | WatfordWAT | Loan |
| 24 Oct 11 | C. Beattie Craig Beattie | Swansea CitySWA | → | WatfordWAT | Loan |
| 11 Oct 11 | M. Kightly Michael Kightly |  Wolverhampton WanderersWOL | → | WatfordWAT | Loan |
| 11 Oct 11 | M. Kightly Michael Kightly | Wolverhampton WanderersWOL | → | WatfordWAT | Loan |
| 15 Sept 11 | M. Whichelow Matthew Whichelow | WatfordWAT | → |  Exeter CityEXE | Loan |
| 12 Sept 11 | G. Massey Gavin Massey | WatfordWAT | → | Yeovil TownYEO | Loan |
| 31 Aug 11 | J. Garner Joe Garner |  Nottingham ForestFOR | → | WatfordWAT | Undisclosed |
| 30 Aug 11 | J. Hogg Jonathan Hogg |  Aston VillaAVL | → | WatfordWAT | Undisclosed |
| 30 Aug 11 | J. Hogg Jonathan Hogg | Aston VillaAVL | → | WatfordWAT | Undisclosed |
| 30 Aug 11 | J. Walker Josh Walker | WatfordWAT | → |  StevenageSTE | Loan |
| 27 Aug 11 | J. Hogg Jonathan Hogg | Aston VillaAVL | → | WatfordWAT | Loan |
| 27 Aug 11 | J. Hogg Jonathan Hogg | Aston VillaAVL | → | WatfordWAT | Loan |
| 26 Aug 11 | A. Weimann Andreas Weimann | Aston VillaAVL | → | WatfordWAT | Loan |
| 26 Aug 11 | A. Weimann Andreas Weimann | Aston VillaAVL | → | WatfordWAT | Loan |
| 25 Aug 11 | A. Thompson Adam Thompson | WatfordWAT | → | BrentfordBRE | Loan |
| 11 Aug 11 | M. Bryan Michael Bryan | WatfordWAT | → |  Bradford CityBRD | Loan |
| 04 Aug 11 | Tom James | XXX | → | WatfordWAT | Free |
| 29 Jul 11 | C. Dickinson Carl Dickinson |  Stoke CitySTK | → | WatfordWAT | Undisclosed |
| 29 Jul 11 | C. Dickinson Carl Dickinson | Stoke CitySTK | → | WatfordWAT | Undisclosed |
| 19 Jul 11 | C. Iwelumo Chris Iwelumo |  BurnleyBUR | → | WatfordWAT | Undisclosed |
| 14 Jul 11 | P. Buaben Prince Buaben |  Dundee UnitedDUN | → | WatfordWAT | Free |
| 14 Jul 11 | P. Buaben Prince Buaben | Dundee UnitedDUN | → | WatfordWAT | Free |
| 13 Jul 11 | M. Yeates Mark Yeates |  Sheffield UnitedSHU | → | WatfordWAT | Undisclosed |
| 07 Jul 11 | L. Young Lewis Young | WatfordWAT | → |  Northampton TownNHT | Free |
| 04 Jul 11 | D. Mirfin David Mirfin |  Scunthorpe UnitedSCU | → | WatfordWAT | Free |
| 01 Jul 11 | D. Cowie Don Cowie | WatfordWAT | → |  Cardiff CityCAR | Free |
| 01 Jul 11 | N. Ellington Nathan Ellington | WatfordWAT | → |  Ipswich TownIPS | Free |
| 01 Jul 11 | T. Aldred Tom Aldred | WatfordWAT | → |  Inverness Caledonian ThistleICT | Loan |
| 01 Jul 11 | T. Aldred Tom Aldred | WatfordWAT | → | Inverness Caledonian ThistleICT | Loan |
| 27 Jun 11 | M. Sadler Mathew Sadler | WatfordWAT | → |  WalsallWAL | Free |
| 21 Jun 11 | C. Forsyth Craig Forsyth |  DundeeDUN | → | WatfordWAT | Undisclosed |
| 21 Jun 11 | N. Ellington Nathan Ellington | WatfordWAT | → | Ipswich TownIPS | Free |
| 17 Jun 11 | D. Graham Danny Graham | WatfordWAT | → | Swansea CitySWA | 3500000 |
| 17 Jun 11 | D. Graham Danny Graham | WatfordWAT | → | Swansea CitySWA | 3500000 |
| 06 Jun 11 | W. Buckley William Buckley | WatfordWAT | → |  Brighton & Hove AlbionBHA | 1000000 |
| 26 May 11 | L. Henderson Liam Henderson | WatfordWAT | → |  York CityYORK | Free |
| 23 Feb 11 | R. Kiernan Robert Kiernan | WatfordWAT | → |  Wycombe WanderersWYC | Loan |
| 15 Feb 11 | L. Henderson Liam Henderson | WatfordWAT | → |  Rotherham UnitedROT | Loan |
| 28 Jan 11 | J. Travner Jure Travner | WatfordWAT | → |  St MirrenSTM | Free |
| 28 Jan 11 | J. Walker Josh Walker | WatfordWAT | → | Northampton TownNHT | Loan |
| 28 Jan 11 | D. Drinkwater Danny Drinkwater |  Manchester UnitedMAN | → | WatfordWAT | Loan |
| 28 Jan 11 | D. Drinkwater Danny Drinkwater | Manchester UnitedMAN | → | WatfordWAT | Loan |
| 28 Jan 11 | J. Travner Jure Travner | WatfordWAT | → | St MirrenSTM | Free |
| 26 Jan 11 | E. Oshodi Eddie Oshodi | WatfordWAT | → |  Rushden & DiamondsRushden & D | Loan |
| 20 Jan 11 | A. Townsend Andros Townsend |  Tottenham HotspurTOT | → | WatfordWAT | Loan |
| 20 Jan 11 | A. Townsend Andros Townsend | Tottenham HotspurTOT | → | WatfordWAT | Loan |
| 19 Jan 11 | A. Weimann Andreas Weimann | Aston VillaAVL | → | WatfordWAT | Loan |
| 19 Jan 11 | A. Weimann Andreas Weimann | Aston VillaAVL | → | WatfordWAT | Loan |
| 13 Jan 11 | N. Ellington Nathan Ellington | WatfordWAT | → |  Preston North EndPNE | Loan |
| 06 Jan 11 | L. Henderson Liam Henderson | WatfordWAT | → |  Aldershot TownALD | Loan |