| Administrator(s) | England and Wales Cricket Board |
|---|---|
| Cricket format | First-class cricket (4 days) |
| Tournament format(s) | League system |
| Champions | Durham (2nd title) |
| Participants | 18 |
| Matches | 144 |
| Most runs | Marcus Trescothick(1,817 for Somerset)[1] |
| Most wickets | Danish Kaneria(75 for Essex)[2] |
The 2009 County Championship season, known as the LV County Championship for sponsorship reasons, was the 110th County Championship season. It was contested through two divisions: Division One and Division Two. Each team played all the others in their division both home and away. The top two teams from Division Two were promoted to the first division for the 2010 season, while the bottom two sides from Division 1 were relegated.
Durham County Cricket Club won the Championship for the second consecutive season. Worcestershire and Sussex were relegated from Division One, with Kent and Essex promoted in their place.