All the signings, moves and news from every county in the build-up to and during the 2013 season.
Counties are allowed to field two overseas players in Twenty20 games, with up to four registered for that competition - although only two can be registered at any one time, and registrations must be for a minimum of 10 days.
Only one overseas player is permitted in the County Championship and Yorkshire Bank 40 league.
Kolpak contracts are signed by foreign players, using a loophole in European Union law to avoid counting against the quota of one overseas player per club.
Overseas player: Shivnarine Chanderpaul (West Indies); Albie Morkel (South Africa, for Twenty20)
Ins: Richard Johnson (Warwickshire), Billy Godleman (Essex), Jonathan Marsden (YTH)
Outs: Garry Park (REL), Matt Lineker (REL), Hamza Siddique (REL), Ross Whiteley (Worcestershire)
Overseas player: None
Ins: Ryan Buckley (YTH)
Outs: Michael Di Venuto (RET), Liam Plunkett (Yorkshire), Ian Blackwell (RET), Mitchell Claydon (Kent, loan from 11 June - 2 September), Ruel Brathwaite (Hampshire)
Overseas player: Rob Quiney (Australia, start of season until mid-May); Hamish Rutherford (New Zealand, early June until mid-August); Shaun Tait (Australia, for Twenty20); Gautam Gambhir (India, mid-August until end of season)
Ins: Sajid Mahmood (Lancashire), Nick Browne (YTH), Monty Panesar (Sussex, loan from 19 August), Kishen Velani (YTH)
Outs: Billy Godleman (Derbyshire), Michael Comber (REL), Charl Willoughby (RET), Adam Wheater (Hampshire), Maurice Chambers (Warwickshire, loan from 28 August until end of season)
Overseas player: Marcus North (Australia); Nathan McCullum (New Zealand, for Twenty20)
Ins: Michael Hogan (UKP), Murray Goodwin (Sussex), Ruaidhri Smith (Scotland)
Outs: Robert Croft (RET), James Harris (Middlesex), Martin van Jaarsveld (REL), Chris Ashling (REL), Aneurin Norman (REL), Mike O'Shea (REL)
Other news: The county have dropped their "Welsh Dragons" limited-overs name and will be known simply as Glamorgan from 2013.
Overseas player: Michael Klinger (Australia); Dan Christian (Australia, for Twenty20)
Ins: Gareth Roderick (YTH), Cameron Herring (YTH), Tom Smith (Middlesex, loan from 20 June), Miles Hammond (YTH)
Outs: David Wade (REL), Jonathan Batty (RET - though joined Northants as emergency cover in September)
Overseas player: George Bailey (Australia, start of season until Champions Trophy); Sohail Tanvir (Pakistan, from 6 June)
Ins: Michael Roberts (Unicorns), Jack Sheppard (YTH), Jake George (YTH), Adam Wheater (Essex), Brad Taylor (YTH), Matt Coles (Kent, loan from 27 August), Ruel Brathwaite (Durham)
Outs: Kabir Ali (Lancashire), Simon Katich (Lancashire), Bilal Shafayat (REL)
Overseas player: Vernon Philander (South Africa, 26 June until end of July)
Ins: Calum Haggett (ex-Somerset), Mitchell Claydon (Durham, loan from 11 June - 2 September), Charlie Hartley (YTH), Matt Hunn (YTH)
Outs: Simon Cook (REL), Chris Piesley (REL), Azhar Mahmood (Surrey), Matt Coles (Hampshire, loan from 27 August)
Other news: West Indian all-rounder Brendan Nash has been registered as a Kolpak player, allowing Kent to sign an overseas player.
Overseas player: Simon Katich (Australia); Mitchell McClenaghan (New Zealand, for Twenty20)
Ins: Kabir Ali (Hampshire), Alex Davies (YTH), Gavin Griffiths (YTH), Luis Reece (YTH), Arron Lilley (YTH), Simon Katich (Hampshire), Wayne White (Leicestershire), Ashwell Prince (KPK), Kyle Jarvis (KPK)
Outs: Naqaash Tahir (REL), Sajid Mahmood (Essex), Gary Keedy (Surrey)
Overseas player: Ramnaresh Sarwan (West Indies, early part of season); Joe Burns (Australia, 15 May - 30 August); Shakib Al Hasan (Bangladesh, for Twenty20)
Ins: Tom Wells (YTH), Robbie Williams (Middlesex), Niall O'Brien (Northants), Anthony Ireland (Middlesex), Ollie Frecklingham (YTH), Angus Robson (YTH), Ben Raine (ex-Durham), Lewis Hill (ex-Unicorns)
Outs: Will Jefferson (RET), Paul Dixey (RET), Jacques du Toit (REL), Nadeem Malik (REL), Robbie Joseph (REL), Will Jones (RET), Wayne White (Lancashire)
Other news: Head coach Phil Whitticase has become director of cricket, with Ben Smith and Lloyd Tennant taking charge of the first and second XIs.
Overseas player: Chris Rogers (Australia, until late June, returning after the Ashes); Adam Voges (Australia, from July once Rogers joins the Ashes squad, including Twenty20); Kyle Mills (New Zealand, for Twenty20)
Ins: Nick Gubbins (YTH), James Harris (Glamorgan), Andrew Balbirnie (Cardiff University), Ryan Higgins (YTH), Tom Helm (YTH), Harry Podmore (YTH)
Outs: Andrew Strauss (RET), Scott Newman (REL), Anthony Ireland (Leicestershire), Robbie Williams (Leicestershire), Tom Scollay (REL), Steven Crook (Northants), Tom Smith (Gloucestershire, loan from 20 June)
Overseas player: Trent Copeland (Australia, start of season until 8 June, returning in September); Cameron White (Australia, for Twenty20); Richard Levi (South Africa, for Twenty20)
Ins: Matt Spriegel (Surrey), Steven Crook (Middlesex), Ben Duckett (YTH), Muhammad Azharullah (UKP), Graeme White (Nottinghamshire, loan for Championship games, from 10 June), Jonathan Batty (ex-Gloucestershire, as emergency cover in September)
Outs: Ben Howegego (REL), Rob White (REL), Dave Burton (REL), Jack Brooks (Yorkshire), Chaminda Vaas (REL), Niall O'Brien (Leicestershire)
Overseas player: Ed Cowan (Australia, start of season until 21 June); David Hussey (Australia, from June, including Twenty20); Ian Butler (New Zealand, for Twenty20)
Ins: Ajmal Shahzad (Yorkshire)
Outs: Karl Turner (REL), Scott Elstone (REL), Neil Edwards (REL), Darren Pattinson (REL), Graeme White (Northants, loan for Championship games, from 10 June), James Taylor (Sussex, loan for Australia game on 26-28 July)
Overseas player: Alviro Petersen (South Africa, from start of season and for Twenty20), Dean Elgar (South Africa, for June); Yasir Arafat (Pakistan, for Twenty20); Abdur Rehman (Pakistan, latter part of season until mid-August); Piyush Chawla (India, from mid-August)
Ins: Tom Abell (YTH)
Outs: Kevin O'Brien (REL, had been on contract for Twenty20), Steve Snell (REL), Nick Compton (Worcestershire, loan for Australia game on 2-5 July), Arul Suppiah (RET on 4 July)
Overseas player: Graeme Smith (South Africa, start of season until he was injured in May); Ricky Ponting (Australia, June-July); Glenn Maxwell (Australia, for Twenty20); Hashim Amla (South Africa, August-September)
Ins: Vikram Solanki (Worcestershire), Gary Keedy (Lancashire), Azhar Mahmood (UKP, Kent, for Twenty20), Kevin O'Brien (Ireland, short-term deal for Twenty20), Dominic Sibley (YTH), Tom Curran
Outs: Mark Ramprakash (RET, has become Middlesex batting coach), Matt Spriegel (Northants), Tom Lancefield (REL), Chris Jordan (Sussex), Rory Hamilton-Brown (Sussex)
Overseas player: Steve Magoffin (Australia); Scott Styris (New Zealand, for Twenty20); Dwayne Smith (West Indies, for Twenty20)
Ins: Rory Hamilton-Brown (Surrey), Chris Jordan (Surrey), Andrew Miller (Warwickshire), Harry Finch (YTH), Callum Jackson (YTH), Matthew Hobden (YTH), James Taylor (Nottinghamshire, loan for Australia game on 26-28 July), Steffan Piolet (Warwickshire, loan from 20 August until end of season), Ashar Zaidi (UKP, non-contract)
Outs: Murray Goodwin (Glamorgan), Andrew Hodd (Yorkshire), Naved Arif (REL), Will Adkin (REL), Kirk Wernars (REL), Monty Panesar (Essex, loan from 19 August)
Overseas player: Jeetan Patel (New Zealand)
Ins: Oliver Hannon-Dalby (Yorkshire), Freddie Coleman (YTH, Scotland), Sam Hain (UKP), Richard Jones (Worcestershire, loan from 22 August until end of season), Maurice Chambers (Essex, loan from 28 August until end of season), Peter McKay (YTH), Jamie Atkinson (Hong Kong), Stuart Poynter (Ireland, on one-game basis as injury cover for last game)
Outs: Richard Johnson (Derbyshire), Neil Carter (REL), Andrew Miller (Sussex), Steffan Piolet (Sussex, loan from 20 August until end of season)
Overseas player: Thilan Samaraweera (Sri Lanka); Andre Russell (West Indies, for Twenty20)
Ins: Graeme Cessford (Royal Air Force), Michael Johnson (UKP, Western Australia, ex-Kent 2nd XI), Nick Compton (Somerset, loan for Australia game on 2-5 July), Ross Whiteley (Derbyshire), Tom Fell (YTH), Tom Kohler-Cadmore (YTH)
Outs: James Cameron (RET), Vikram Solanki (Surrey), Jack Manuel (REL), Ben Scott (RET), Richard Jones (Warwickshire, loan from 22 August until end of season)
Overseas player: Kane Williamson (New Zealand, mid-August until end of season)
Ins: Andrew Hodd (Sussex), Jack Brooks (Northants), Liam Plunkett (Durham), Matthew Fisher (YTH), Ryan Gibson (YTH)
Outs: Gerard Brophy (REL), Ajmal Shahzad (Nottinghamshire), Oliver Hannon-Dalby (Warwickshire), Anthony McGrath (RET), Alex Lilley (REL)
Other news: Yorkshire have announced they will be known as the Vikings in one-day cricket in 2013 - their fourth different name since one-day nicknames were introduced by the ECB.