| Administrator(s) | Test and County Cricket Board |
|---|---|
| Cricket format | Limited overs cricket(40 overs per innings) |
| Tournament format(s) | League |
| Champions | Derbyshire (1st title) |
| Participants | 17 |
| Matches | 136 |
| Most runs | 902 Jimmy Cook (Somerset) |
| Most wickets | 31 Waqar Younis (Surrey) |
The 1990 Refuge Assurance League was the twenty-second competing of what was generally known as the Sunday League. The competition was won for the first time by Derbyshire County Cricket Club.
| Team | Pld | W | T | L | N/R | A | Pts | Rp100 |
|---|---|---|---|---|---|---|---|---|
| Derbyshire (C) | 16 | 12 | 0 | 3 | 1 | 0 | 50 | 87.354 |
| Lancashire | 16 | 11 | 0 | 3 | 1 | 1 | 48 | 100.186 |
| Middlesex | 16 | 10 | 0 | 5 | 1 | 0 | 42 | 95.401 |
| Nottinghamshire | 16 | 10 | 0 | 5 | 1 | 0 | 42 | 89.313 |
| Hampshire | 16 | 9 | 0 | 5 | 2 | 0 | 40 | 88.828 |
| Surrey | 16 | 9 | 0 | 6 | 0 | 1 | 38 | 90.393 |
| Yorkshire | 16 | 9 | 0 | 6 | 0 | 1 | 38 | 83.607 |
| Gloucestershire | 16 | 7 | 0 | 7 | 2 | 0 | 32 | 87.808 |
| Somerset | 16 | 8 | 0 | 8 | 0 | 0 | 32 | 91.255 |
| Kent | 16 | 7 | 0 | 8 | 0 | 1 | 30 | 85.950 |
| Worcestershire | 16 | 7 | 0 | 8 | 1 | 0 | 30 | 84.964 |
| Essex | 16 | 6 | 0 | 9 | 0 | 1 | 26 | 90.570 |
| Sussex | 16 | 5 | 0 | 9 | 0 | 2 | 24 | 85.906 |
| Warwickshire | 16 | 5 | 0 | 10 | 1 | 0 | 22 | 80.695 |
| Glamorgan | 16 | 4 | 0 | 11 | 0 | 1 | 18 | 84.209 |
| Leicestershire | 16 | 4 | 0 | 11 | 1 | 0 | 18 | 76.592 |
| Northamptonshire | 16 | 3 | 0 | 12 | 1 | 0 | 14 | 83.411 |
| Team marked (C) finished as champions. Source: CricketArchive[1] | ||||||||
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Main article: 1990 Refuge Assurance Cup |
Following the end of the Sunday League season, the top four teams in the Sunday League competed for the Refuge Assurance Cup. Middlesex emerged as victors, defeating Derbyshire in the final.