2001 County Championship
The 2001 County Championship season, known as the CricInfo Championship for sponsorship reasons, was contested through two divisions: Division One and Division Two. Each team plays all the others in their division both home and away. The top three teams from Division Two were promoted to the first division for 2002, while the bottom three sides from Division 1 are relegated.
Teams
Division One
Team promoted from Division Two| Team | Primary home ground | Other grounds | Captain |
| Essex | County Ground, Chelmsford | Valentines Park, Ilford Southchurch Park, Southend-on-Sea Castle Park Cricket Ground, Colchester |  Nasser Hussain |
| Glamorgan | Sophia Gardens, Cardiff | St Helen's, Swansea Colwyn Bay Cricket Club Ground, Rhos on Sea | Steve James |
| Kent | St Lawrence Ground, Canterbury | Nevill Ground, Tunbridge Wells Mote Park, Maidstone | Matthew Fleming |
| Lancashire | Old Trafford, Manchester | — | John Crawley |
| Leicestershire | Grace Road, Leicester | — | Vince Wells |
| Northamptonshire | County Ground, Northampton | — | David Ripley |
| Somerset | County Ground, Taunton | Recreation Ground, Bath |  Jamie Cox |
| Surrey | The Oval, London | Woodbridge Road, Guildford | Adam Hollioake |
| Yorkshire | Headingley, Leeds | North Marine Road Ground, Scarborough | David Byas |
Division Two
Team relegated from Division One| Team | Primary home ground | Other grounds | Captain |
| Derbyshire | County Ground, Derby | — | Dominic Cork |
| Durham | Riverside Ground, Chester-le-Street | — | Jonathan Lewis |
| Gloucestershire | County Ground, Bristol | Archdeacon Meadow, Gloucester College Ground, Cheltenham | Mark Alleyne |
| Hampshire | Rose Bowl, Southampton | — | Robin Smith |
| Middlesex | Lord's, London | John Walker's Ground, Southgate | Angus Fraser |
| Nottinghamshire | Trent Bridge, Nottingham | — | Jason Gallian |
| Sussex | County Ground, Hove | Cricket Field Road Ground, Horsham Arundel Castle Cricket Ground, Arundel | Chris Adams |
| Warwickshire | Edgbaston, Birmingham | — | Mike Powell |
| Worcestershire | County Ground, New Road, Worcester | Chester Road North Ground, Kidderminster | Graeme Hick |