| Administrator(s) | Test and County Cricket Board |
|---|---|
| Cricket format | Limited overs cricket(40 overs per innings) |
| Tournament format(s) | League |
| Champions | Worcestershire (3rd title) |
| Participants | 17 |
| Matches | 136 |
| Most runs | 573 David Turner (Hampshire) |
| Most wickets | 28 Ian Greig (Surrey) |
The 1988 Refuge Assurance League was the twentieth competing of what was generally known as the Sunday League. The competition was won for the third time by Worcestershire County Cricket Club.