| Administrator(s) | England and Wales Cricket Board |
|---|---|
| Cricket format | First-class cricket (4 days) |
| Tournament format(s) | League system |
| Champions | Sussex (1st title) |
| Participants | 18 |
| Matches | 144 |
| Most runs | Stuart Law (1,820 for Lancashire)[1] |
| Most wickets | Mushtaq Ahmed (103 for Sussex)[2] |
The 2003 County Championship season, known as the Frizzell County Championship, was the 103rd County Championship. 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 three teams from Division Two were promoted to the first division for the 2004 season, while the bottom three sides from Division 1 were relegated.