| Cricket format | First-class cricket (3 days) |
|---|---|
| Tournament format(s) | League system |
| Champions | Middlesex (1st title) |
| Participants | 15 |
| Most runs | C. B. Fry (2,413 for Sussex) |
| Most wickets | Wilfred Rhodes (143 for Yorkshire) |
Location of the home ground of each county
The 1903 County Championship was the 14th officially organised running of the County Championship, and ran from 4 May to 3 September 1903. Middlesex won their first championship title, ending Yorkshire's run of three successive titles. Sussex finished in second place for the second successive season.