| 15 Oct 10 | F. Fielding Frank Fielding |  Blackburn RoversBLK | → |  Derby CountyDER | Loan |
| 15 Oct 10 | F. Fielding Frank Fielding | Blackburn RoversBLK | → | Derby CountyDER | Loan |
| 15 Oct 10 | J. Severn James Severn | Derby CountyDER | → |  TamworthTamworth | Loan |
| 27 Sept 10 | R. Noble Ryan Noble |  SunderlandSUN | → | Derby CountyDER | Loan |
| 27 Sept 10 | R. Noble Ryan Noble | SunderlandSUN | → | Derby CountyDER | Loan |
| 24 Sept 10 | L. Moore Luke Moore |  West Bromwich AlbionWBA | → | Derby CountyDER | Loan |
| 24 Sept 10 | L. Moore Luke Moore | West Bromwich AlbionWBA | → | Derby CountyDER | Loan |
| 13 Sept 10 | S. Kuqi Shefki Kuqi |  Swansea CitySWA | → | Derby CountyDER | Loan |
| 31 Aug 10 | A. Bueno Alberto Bueno | RVXReal ValladolidReal Valladolid | → | Derby CountyDER | Loan |
| 31 Aug 10 | R. Hulse Robert Hulse | Derby CountyDER | → |  Queens Park RangersQPR | Undisclosed |
| 31 Aug 10 | A. Mendy Arnaud Mendy | Derby CountyDER | → |  Tranmere RoversTRN | Loan |
| 27 Aug 10 | L. Varney Luke Varney | Derby CountyDER | → |  BlackpoolBLP | Loan |
| 27 Aug 10 | L. Varney Luke Varney | Derby CountyDER | → | BlackpoolBLP | Loan |
| 12 Aug 10 | R. Atkins Ross Atkins | Derby CountyDER | → | TamworthTamworth | Loan |
| 06 Aug 10 | C. Doyle Conor Doyle | XXX | → | Derby CountyDER | Free |
| 02 Jul 10 | G. Teale Gary Teale | Derby CountyDER | → |  Sheffield WednesdaySHW | Free |
| 01 Jul 10 | T. Cywka Tomasz Cywka |  Wigan AthleticWGA | → | Derby CountyDER | Free |
| 01 Jul 10 | T. Cywka Tomasz Cywka | Wigan AthleticWGA | → | Derby CountyDER | Free |
| 01 Jul 10 | L. Croft Lee Croft | Derby CountyDER | → |  BrentfordBRE | Loan |
| 10 Jun 10 | P. Connolly Paul Connolly | Derby CountyDER | → |  Leeds UnitedLEE | Undisclosed |
| 19 May 10 | J. Bailey James Bailey |  Crewe AlexandraCREW | → | Derby CountyDER | Undisclosed |
| 19 May 10 | J. Brayford John Brayford | Crewe AlexandraCREW | → | Derby CountyDER | Undisclosed |
| 25 Mar 10 | T. Cywka Tomasz Cywka | Wigan AthleticWGA | → | Derby CountyDER | Loan |
| 25 Mar 10 | A. Mendy Arnaud Mendy | Derby CountyDER | → |  Rotherham UnitedROT | Loan |
| 25 Mar 10 | T. Cywka Tomasz Cywka | Wigan AthleticWGA | → | Derby CountyDER | Loan |
| 23 Mar 10 | L. Hendrie Lee Hendrie | Derby CountyDER | → |  Brighton & Hove AlbionBHA | Loan |
| 16 Mar 10 | P. Connolly Paul Connolly | Derby CountyDER | → |  Sheffield UnitedSHU | Loan |
| 12 Mar 10 | D. Martin David Martin |  LiverpoolLIV | → | Derby CountyDER | Loan |
| 12 Mar 10 | D. Martin David Martin | LiverpoolLIV | → | Derby CountyDER | Loan |
| 19 Feb 10 | G. Sunu Gilles Sunu |  ArsenalARS | → | Derby CountyDER | Loan |
| 19 Feb 10 | G. Sunu Gilles Sunu | ArsenalARS | → | Derby CountyDER | Loan |
| 18 Feb 10 | R. Atkins Ross Atkins | Derby CountyDER | → |  Kidderminster HarriersKID | Loan |
| 09 Feb 10 | D. Martin David Martin |  MillwallMIL | → | Derby CountyDER | Loan |
| 01 Feb 10 | J. Vidal Javan Vidal |  Manchester CityMNC | → | Derby CountyDER | Loan |
| 01 Feb 10 | J. Vidal Javan Vidal | Manchester CityMNC | → | Derby CountyDER | Loan |
| 01 Feb 10 | M. Tonge Michael Tonge |  Stoke CitySTK | → | Derby CountyDER | Loan |
| 01 Feb 10 | A. Prijovic Alex Prijovic | Derby CountyDER | → |  FC SionSION | Free |
| 01 Feb 10 | M. Tonge Michael Tonge | Stoke CitySTK | → | Derby CountyDER | Loan |
| 29 Jan 10 | G. Mills Greg Mills | Derby CountyDER | → |  Macclesfield TownMACC | Loan |
| 23 Jan 10 | R. Atkins Ross Atkins | Derby CountyDER | → |  Burton AlbionBRT | Loan |
| 21 Jan 10 | L. Varney Luke Varney | Derby CountyDER | → | Sheffield WednesdaySHW | Loan |
| 15 Jan 10 | R. Anderson Russell Anderson | SunderlandSUN | → | Derby CountyDER | Free |
| 15 Jan 10 | R. Anderson Russell Anderson | SunderlandSUN | → | Derby CountyDER | Free |
| 07 Jan 10 | N. Hunt Nicky Hunt |  Bolton WanderersBOL | → | Derby CountyDER | Loan |
| 07 Jan 10 | N. Hunt Nicky Hunt | Bolton WanderersBOL | → | Derby CountyDER | Loan |
| 01 Jan 10 | L. Johnson Lee Johnson |  Bristol CityBRC | → | Derby CountyDER | Loan |