| 26 Nov 15 | B. Fewster Bradley Fewster |  MiddlesbroughMID | → |  York CityYORK | Loan |
| 26 Nov 15 | M. Kitching Mark Kitching | MiddlesbroughMID | → | York CityYORK | Loan |
| 26 Nov 15 | J. Jones Jordan Jones | MiddlesbroughMID | → |  Cambridge UnitedCAMB | Loan |
| 04 Nov 15 | A. Jackson Adam Jackson | MiddlesbroughMID | → |  Hartlepool UnitedHAR | Loan |
| 28 Oct 15 | B. Morris Bryn Morris | MiddlesbroughMID | → | York CityYORK | Loan |
| 26 Oct 15 | B. Zuculini Bruno Zuculini |  Manchester CityMNC | → | MiddlesbroughMID | Loan |
| 26 Oct 15 | B. Zuculini Bruno Zuculini | Manchester CityMNC | → | MiddlesbroughMID | Loan |
| 20 Oct 15 | B. Halliday Brad Halliday | MiddlesbroughMID | → |  Accrington StanleyACCR | Loan |
| 01 Oct 15 | Y. Wildschut Yanic Wildschut | MiddlesbroughMID | → |  Wigan AthleticWGA | Loan |
| 26 Sept 15 | A. Reach Adam Reach | MiddlesbroughMID | → |  Preston North EndPNE | Loan |
| 14 Sept 15 | A. Jackson Adam Jackson | MiddlesbroughMID | → |  Coventry CityCOV | Loan |
| 10 Sept 15 | B. Halliday Brad Halliday | MiddlesbroughMID | → | Hartlepool UnitedHAR | Loan |
| 01 Sept 15 | C. De Pena Carlos De Pena |  NacionalNAC | → | MiddlesbroughMID | Undisclosed |
| 29 Aug 15 | M. Agazzi Michael Agazzi |  AC MilanMIL | → | MiddlesbroughMID | Loan |
| 29 Aug 15 | M. Agazzi Michael Agazzi | AC MilanMIL | → | MiddlesbroughMID | Loan |
| 28 Aug 15 | J. Husband James Husband | MiddlesbroughMID | → |  FulhamFUL | Loan |
| 28 Aug 15 | F. Amorebieta Fernando Amorebieta | FulhamFUL | → | MiddlesbroughMID | Loan |
| 27 Aug 15 | M. Carayol Mustapha Carayol | MiddlesbroughMID | → |  Huddersfield TownHUD | Loan |
| 14 Aug 15 | D. Nugent David Nugent |  Leicester CityLEI | → | MiddlesbroughMID | Undisclosed |
| 14 Aug 15 | D. Nugent David Nugent | Leicester CityLEI | → | MiddlesbroughMID | Undisclosed |
| 07 Aug 15 | C. Stuani Cristhian Stuani |  EspanyolESP | → | MiddlesbroughMID | Undisclosed |
| 07 Aug 15 | C. Stuani Cristhian Stuani | EspanyolESP | → | MiddlesbroughMID | Undisclosed |
| 06 Aug 15 | B. Morris Bryn Morris | MiddlesbroughMID | → | Coventry CityCOV | Loan |
| 04 Aug 15 | L. Tomlin Lee Tomlin | MiddlesbroughMID | → |  AFC BournemouthBOU | Undisclosed |
| 04 Aug 15 | L. Tomlin Lee Tomlin | MiddlesbroughMID | → | AFC BournemouthBOU | Undisclosed |
| 03 Aug 15 | Jonathan Burn | MiddlesbroughMID | → |  Oldham AthleticOLD | Loan |
| 31 Jul 15 | J. Stephens Jack Stephens |  SouthamptonSOU | → | MiddlesbroughMID | Loan |
| 31 Jul 15 | J. Stephens Jack Stephens | SouthamptonSOU | → | MiddlesbroughMID | Loan |
| 27 Jul 15 | D. Fabbrini Diego Fabbrini |  WatfordWAT | → | MiddlesbroughMID | Loan |
| 27 Jul 15 | D. Fabbrini Diego Fabbrini | WatfordWAT | → | MiddlesbroughMID | Loan |
| 17 Jul 15 | T. Kalas Tomás Kalas |  ChelseaCHE | → | MiddlesbroughMID | Loan |
| 17 Jul 15 | T. Kalas Tomás Kalas | ChelseaCHE | → | MiddlesbroughMID | Loan |
| 16 Jul 15 | S. Downing Stewart Downing |  West Ham UnitedWHU | → | MiddlesbroughMID | Undisclosed |
| 16 Jul 15 | S. Downing Stewart Downing | West Ham UnitedWHU | → | MiddlesbroughMID | Undisclosed |
| 06 Jul 15 | A. Baptiste Alex Baptiste |  Bolton WanderersBOL | → | MiddlesbroughMID | Undisclosed |
| 02 Jul 15 | E. Ledesma Emmanuel Ledesma | MiddlesbroughMID | → |  Rotherham UnitedROT | Free |
| 01 Jul 15 | D. Whitehead Dean Whitehead | MiddlesbroughMID | → | Huddersfield TownHUD | Free |
| 26 Mar 15 | D. Tiendalli Dwight Tiendalli |  Swansea CitySWA | → | MiddlesbroughMID | Loan |
| 26 Mar 15 | L. Williams Luke Williams | MiddlesbroughMID | → |  Peterborough UnitedPET | Loan |
| 26 Mar 15 | D. Tiendalli Dwight Tiendalli | Swansea CitySWA | → | MiddlesbroughMID | Loan |
| 26 Mar 15 | M. Carayol Mustapha Carayol | MiddlesbroughMID | → |  Brighton & Hove AlbionBHA | Loan |
| 26 Mar 15 | D. Atkinson David Atkinson | MiddlesbroughMID | → |  Carlisle UnitedCAR | Loan |
| 25 Mar 15 | F. Amorebieta Fernando Amorebieta | FulhamFUL | → | MiddlesbroughMID | Loan |
| 25 Mar 15 | J. Husband James Husband | MiddlesbroughMID | → | FulhamFUL | Loan |
| 24 Feb 15 | S. Hines Seb Hines | MiddlesbroughMID | → |  Orlando City SCORL | Loan |
| 24 Feb 15 | S. Hines Seb Hines | MiddlesbroughMID | → | Orlando City SCORL | Loan |
| 19 Feb 15 | E. Ledesma Emmanuel Ledesma | MiddlesbroughMID | → | Brighton & Hove AlbionBHA | Loan |
| 13 Feb 15 | J. Jones Jordan Jones | MiddlesbroughMID | → | Hartlepool UnitedHAR | Loan |
| 02 Feb 15 | L. Williams Luke Williams | MiddlesbroughMID | → | Coventry CityCOV | Loan |
| 28 Jan 15 | A. Forshaw Adam Forshaw | Wigan AthleticWGA | → | MiddlesbroughMID | Undisclosed |
| 26 Jan 15 | A. Halliday Andy Halliday | MiddlesbroughMID | → |  Bradford CityBRD | Undisclosed |
| 23 Jan 15 | C. Wyke Charlie Wyke | MiddlesbroughMID | → | Carlisle UnitedCAR | Undisclosed |
| 09 Jan 15 | T. Kalas Tomás Kalas | ChelseaCHE | → | MiddlesbroughMID | Loan |
| 09 Jan 15 | T. Kalas Tomás Kalas | ChelseaCHE | → | MiddlesbroughMID | Loan |