2018 Main
North
| Pts | W | L | D | N/R | Pts | |||
| 1 | Worcestershire | 8 | 6 | 2 | 0 | 0 | 2198:2266 | 12 |
| 2 | Nottinghamshire | 8 | 5 | 2 | 0 | 1 | 1776:1757 | 11 |
| 3 | Yorkshire | 8 | 5 | 2 | 0 | 1 | 2032:1870 | 11 |
| 4 | Warwickshire / Birmingham Bears | 8 | 4 | 2 | 0 | 2 | 1646:1593 | 10 |
| 5 | Derbyshire | 8 | 4 | 4 | 0 | 0 | 1943:1912 | 8 |
| 6 | Lancashire | 8 | 3 | 4 | 0 | 1 | 1984:1793 | 7 |
| 7 | Northamptonshire | 8 | 2 | 5 | 0 | 1 | 1834:1948 | 5 |
| 8 | Leicestershire | 8 | 2 | 6 | 0 | 0 | 2078:2114 | 4 |
| 9 | Durham | 8 | 2 | 6 | 0 | 0 | 1808:2046 | 4 |
South
| Pts | W | L | D | N/R | Pts | |||
| 1 | Hampshire | 8 | 5 | 2 | 0 | 1 | 1864:1897 | 11 |
| 2 | Essex | 8 | 5 | 3 | 0 | 0 | 2273:2076 | 10 |
| 3 | Kent | 8 | 5 | 3 | 0 | 0 | 1984:2115 | 10 |
| 4 | Somerset | 8 | 4 | 3 | 0 | 1 | 1906:1746 | 9 |
| 5 | Surrey | 8 | 4 | 3 | 0 | 1 | 1643:1818 | 9 |
| 6 | Middlesex | 8 | 4 | 4 | 0 | 0 | 2140:2022 | 8 |
| 7 | Gloucestershire | 8 | 2 | 3 | 0 | 3 | 1447:1482 | 7 |
| 8 | Sussex | 8 | 2 | 4 | 0 | 2 | 1552:1561 | 6 |
| 9 | Glamorgan | 8 | 1 | 7 | 0 | 0 | 2103:2195 | 2 |
Promotion ~ One~Day Cup (Play Offs: Semi~finals)
Promotion ~ One~Day Cup (Play Offs: Quarter~finals)
2018 Play Offs
Quarter-finals
| 1 | Worcestershire (1) | Bye | |
| 2 | Nottinghamshire (2) | Kent (3) | 255 : 257 |
| 3 | Hampshire (1) | Bye | |
| 4 | Essex (2) | Yorkshire (3) | 234 : 259 |
Semi-finals
| 1 | Worcestershire (1) | Kent (3) | 306 : 307 |
| 2 | Hampshire (1) | Yorkshire (3) | 348 : 241 |
Final
| 1 | Kent (3) | Hampshire (1) | 269 : 330 |
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