| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| From | Cost | Date | To | Cost | Date | ||
| Iddon | H | Preston North End | Guest | 1944-45 | NA | ||
| Ihiekwe | M | Juniors | NA | 1 July 2013 | Cheltenham Town | Loan | 10 January 2014 |
| Tranmere Rovers | Free | 18 June 2014 | |||||
| Ikeme | C | Juniors | NA | 1 July 2003 | Accrington Stanley (2) | Loan | 14 October 2004 |
| Stockport County | Loan | 31 August 2005 | |||||
| Charlton Athletic | Loan | 28 October 2009 | |||||
| Sheffield United | Loan | 26 November 2009 | |||||
| QPR | Loan | 6 January 2010 | |||||
| Leicester City | Loan | 27 August 2010 | |||||
| Middlesbrough | Loan | 1 August 2011 | |||||
| Doncaster Rovers | Loan | 18 November 2011 | |||||
| Doncaster Rovers | Loan | 31 January 2012 | |||||
| Retired | 1 July 2018 | ||||||
| Ince | PEC | Middlesbrough | Free | 6 August 2002 | Swindon Town | Free | 30 August 2006 |
| Ingimarsson | I | Brentford | Free | 1 July 2002 | Brighton & Hove Albion | Loan | 11 February 2003 |
| Reading | £100,000 | 23 October 2003 | |||||
| Iorfa | D | Juniors | NA | 1 July 2013 | Shrewsbury Town | Loan | 17 March 2014 |
| Ipswich Town | Loan | 14 July 2017 | |||||
| Sheffield Wednesday | Fee Unknown | 31 January 2019 | |||||
| Irwin | JD | Manchester United | Free | 23 July 2002 | Retired | 1 August 2004 | |
| Isherwood | D | Juniors | NA | 22 September 1943 | Released | 1 August 1944 | |
| Ismail | Z | Juniors | NA | 1 July 2012 | MK Dons | Loan | 22 November 2012 |
| Burton Albion | Loan | 8 January 2014 | |||||
| Notts County | Loan | 18 July 2014 | |||||
| Burton Albion | Loan | 29 July 2015 | |||||
| Oxford United | Loan | 1 February 2016 | |||||
| Cambridge United | Loan | 5 March 2016 | |||||
| Bury | Free | 1 July 2016 | |||||
| Iversen | S | Tottenham Hotspur | Free | 1 August 2003 | Valerenga [Nor] | Free | 1 June 2004 |
| Iverson | RTJ | Lincoln City | Fee Unknown | 22 February 1935 | Aston Villa | Free | 18 December 1936 |
| Ivill | E | Oldham Athletic | Fee Unknown | 7 November 1932 | Charlton Athletic | £1,700 | 20 January 1933 |
| Iwelumo | CR | Charlton Athletic | £468,000 | 14 July 2008 | Bristol City | Loan | 13 February 2010 |
| Burnley | £428,000 | 1 June 2010 |
