OXFORD United have 13 players out of contract this summer - but they are not the only Sky Bet League One outfit with a host of squad members nearing the end of their deals.

Josh Ruffels, Anthony Forde and Rob Hall are among those who could leave the U's on June 30 if new terms are not agreed, while the club can trigger an extra year for James Henry, Mark Sykes, Alex Gorrin and more.

Read also: Mark Sykes would rather have points than games in hand in play-off race

Add United's six loanees to the list and there could be a lot of turnover this summer, but other teams are facing even more upheaval.

Ipswich Town, for example, have 20 players out of contract in the close season, while 17 Sunderland players are nearing the end of their deals.

Meanwhile, newly-relegated Swindon Town face losing 18 members of their squad, plus the returning loanees.

Here are the players whose deals are set to expire at most of United's League One rivals.

Blackpool

Alex Fojticek (club option), Ollie Turton, James Husband (club option), Luke Garbutt, Nathan Shaw (club option), Grant Ward (club option), Sullay Kaikai (club option), Gary Madine, Dan Ballard (loan), Jordan Gabriel (loan), Elliot Embleton (loan), Ellis Simms (loan).

Witney Gazette:

Dan Ballard scored against Oxford United in March Picture: Ric Mellis

Bristol Rovers

Josh Hare, Mark Little, Luke Leahy, Alex Rodman, Tom Davies, Kyle Bennett, Ed Upson, Abu Ogogo, Michael Kelly, Jordi van Stappershoef, Pablo Martinez (option), Erhun Oztumer (loan), Luke McCormick (loan), Joe Day (loan).

Burton Albion

Ben Garratt, Michael Bostwick, Neal Eardley, Colin Daniel, Reece Hutchinson, John-Joe O'Toole, Michael Mancienne, Danny Rowe, Ryan Edwards, Stephen Quinn, Ben Fox, Lucas Akins, Luke Varney, Mike Fondop, Hayden Carter (loan), Josh Earl (loan), Sean Clare (loan), Dillon Barnes (loan), Ryan Broom (on loan).

Charlton Athletic

Ben Amos, Adam Matthews, Deji Oshilaja, Jason Pearce, Jake Forster-Caskey, Erhun Oztumer, Darren Pratley, Ben Watson (option), Marcus Maddison (option), Chuks Aneke, James Vennings, Ben Dempsey, Andrew Shinnie, Jayden Stockley (loan), Liam Millar (loan), Ian Maatsen (loan), Akin Famewo (loan), Matt Smith (loan).

Doncaster Rovers

James Coppinger (retiring), Jon Taylor, Joe Wright, Reece James, Brad Halliday, Madger Gomes, Jason Lokilo, Branden Horton, AJ Greaves, Charlie Seaman, Ian Lawlor, Danny Amos, Taylor Richards (loan), Matt Smith (loan), Josh Sims (loan), Ellery Balcombe (loan), Tyreece John-Jules (loan), Scott Robertson (loan), Elliot Simoes (loan).

Gillingham

Jack Bonham, Sacha Bastien, Connor Ogilvie, Stuart O’Keefe, Matty Willock, Henry Woods, Tyreke Johnson, Jordan Graham, Toby Bancroft, Robbie Cundy (loan), Thomas O’Connor (loan), Olly Lee (loan), Callum Slattery (loan), James Morton (loan).

Witney Gazette:

Robbie Cundy scores for Gillingham against Oxford United Picture: Ric Mellis

Hull City

Reece Burke (option), Jordy De Wijs (option), Brandon Fleming (option), Alfie Jones (option), George Long (option), Josh Magennis (option), Regan Slater (loan), Dan Crowley (loan), Gavin Whyte (loan).

Read also: Karl Robinson confirms Gavin Whyte was January target

Ipswich Town

Luke Chambers, Cole Skuse (option), Stephen Ward (option), James Wilson (option), Freddie Sears (option), Kayden Jackson (option), Teddy Bishop (option), Toto Nsiala (option), Gwion Edwards, Janoi Donacien (option), Alan Judge, Emyr Huws (option), Aaron Drinan (option), Tristan Nydam (option), Idris El Mizouni (option), Ben Morris (option), Bailey Clements (option), Liam Gibbs (option), Levi Andoh (option), Tommy Hughes (option), Mark McGuinness (loan), Keanan Bennetts (loan), Josh Harrop (loan), Troy Parrott (loan), Luke Matheson (loan), Luke Thomas (loan).

Lincoln City

Ethan Ross, Zack Elbouzedi (option), Harry Anderson (option), Theo Archibald, Alex Palmer (loan), TJ Eyoma (loan), Morgan Rogers (loan), Brennan Johnson (loan), Callum Morton (loan).

MK Dons

Lee Nicholls, Laurie Walker, Matthew Sorinola, Josh McEachran, Jordan Houghton, Ben Gladwin, Andrew Surman, Kieran Agard, Joe Mason, Cameron Jerome, Jay Bird, Lasse Sorensen (loan), Ethan Laird (loan), Louis Thompson (loan), Will Grigg (loan).

Northampton Town

Lloyd Jones, Alex Jones, Alan Sheehan, Steve Arnold, Ryan Watson, Cian Bolger (option), Shaun McWilliams, Mark Marshall, Ricky Korboa (option), Jonathan Mitchell (loan), Bryn Morris (loan), Mickel Miller (loan), Peter Kioso (loan), Ryan Edmondson (loan).

Read also: Karl Robinson eyes Marcus McGuane return

Oxford United

Josh Ruffels, Anthony Forde, Rob Hall, Fabio Lopes, Kyran Lofthouse, Michael Elechi, Alex Gorrin (option), James Henry (option), Mark Sykes (option), John Mousinho (option), Nico Jones (option), Dylan Asonganyi (option), Slavi Spasov (option), Marcus McGuane (loan), Brandon Barker (loan), Elliot Lee (loan), Mide Shodipo (loan), Liam Kelly (loan), Joe Grayson (loan).

Peterborough United

Dan Butler (option), Louis Reed, Siriki Dembele (option), Nathan Thompson (option), Frazer Blake-Tracy (option), Sam Cartwright (option), Reece Brown (loan), Josef Bursik (loan).

Witney Gazette:

Portsmouth's Ryan Williams (left) was on loan at Oxford United in 2013/14 Picture: David Fleming

Portsmouth

Jordy Hiwula, Tom Naylor, Andy Cannon (option), Bryn Morris, Craig MacGillivray, Jack Whatmough, Ben Close (option), Ryan Williams, Haji Mnoga (option), Charlie Daniels, Duncan Turnbull, George Byers (loan), Harvey White (loan), Rasmus Nicolaisen (loan), Lewis Ward (loan).

Shrewsbury Town

Dave Edwards (considering retirement), Scott Golbourne, Ro-Shaun Williams, Sean Goss, Shaun Whalley, Leon Clarke, Ryan Sears, Donald Love, Brad Walker, Curtis Main, Daniel Udoh, David Davis, Ryan Barnett, Matija Sarkic (loan), Harry Chapman (loan), Matthew Pennington (loan).

Sunderland

Remi Matthews, Lee Burge, Grant Leadbitter, Aiden McGeady, Max Power, Oliver Younger, Josh Scowen, Anthony Patterson (option), Benji Kimpioka (option), Charlie Wyke, Chris Maguire, Conor McLaughlin, Jordan Willis, Callum McFadzean, Denver Hume, Luke O'Nien, George Dobson, Dion Sanderson (loan), Jordan Jones (loan), Jake Vokins (loan).

Swindon Town

Lee Camp, Dion Conroy, Tom Broadbent, Akin Odimayo (option), Jonathan Grounds, Paul Caddis, Christopher Missilou, Matty Palmer, Anthony Grant, Scott Twine (contract offered), Joel Grant, Brett Pitman (option), Hallam Hope, Harry Parsons, Archie Matthews, Anthony Cheshire, Luke Haines, Massimo Giamattei, Tyrese Omotoye (loan), Jordon Garrick (loan), Tyler Smith (loan), Dominic Thompson (loan), Conor Masterson (loan).

Wigan Athletic

Zach Clough, Tendayi Darikwa, Joe Dodoo, Owen Evans, Lee Evans, Dan Gardner, George Johnston, Jamie Jones, Kyle Joseph, Will Keane, Gavin Massey, Chris Merrie, Alex Perry, Jamie Proctor, Viv Solomon-Otabor, Corey Whelan, Scott Wootton, Curtis Tilt (loan), Funso Ojo (loan).

Plymouth Argyle

Will Aimson, Joe Edwards, Ryan Law, Klaidi Lolos, Lewis Macleod, Danny Mayor, Luke McCormick, Byron Moore, Frank Nouble, Ben Reeves, Jack Ruddy, Scott Wootton, Conor Grant, Tyrese Fornah (loan), Adam Lewis (loan), Jerome Opoku (loan), Kell Watts (loan), Sam Woods (loan).