| Administrator: | Test and County Cricket Board |
| Cricket Format: | Limited overs cricket(40 overs per innings) |
| Tournament Format: | League |
| Champions: | Essex |
| Count: | 2 |
| Participants: | 17 |
| Matches: | 136 |
| Most Runs: | 720 Chris Smith (Hampshire) |
| Most Wickets: | 29 Wayne Daniel (Middlesex) |
| Previous Year: | 1983 |
| Previous Tournament: | 1983 John Player League |
| Next Year: | 1985 |
| Next Tournament: | 1985 John Player Special League |
The 1984 John Player Special League was the sixteenth competing of what was generally known as the Sunday League. The competition was won for the second time by Essex County Cricket Club.
| width=200 | Team | width=20 | Pld | width=20 | W | width=20 | T | width=20 | L | width=20 | N/R | width=20 | A | width=20 | Pts | width=60 | R/R |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Essex (C) | 16 | 12 | 1 | 3 | 0 | 0 | 50 | 5.338 | |||||||||
| 16 | 10 | 0 | 5 | 0 | 1 | 42 | 5.181 | ||||||||||
| 16 | 9 | 0 | 4 | 1 | 2 | 42 | 4.876 | ||||||||||
| 16 | 10 | 0 | 6 | 0 | 0 | 40 | 4.653 | ||||||||||
| 16 | 9 | 1 | 5 | 1 | 0 | 40 | 5.085 | ||||||||||
| 16 | 9 | 0 | 5 | 1 | 1 | 40 | 4.549 | ||||||||||
| 16 | 7 | 0 | 6 | 2 | 1 | 34 | 5.282 | ||||||||||
| 16 | 7 | 0 | 7 | 1 | 1 | 32 | 5.130 | ||||||||||
| 16 | 6 | 0 | 8 | 2 | 0 | 28 | 4.967 | ||||||||||
| 16 | 7 | 0 | 9 | 0 | 0 | 28 | 5.420 | ||||||||||
| 16 | 6 | 0 | 8 | 1 | 1 | 28 | 4.963 | ||||||||||
| 16 | 6 | 0 | 9 | 1 | 0 | 26 | 5.067 | ||||||||||
| 16 | 5 | 0 | 9 | 0 | 2 | 24 | 4.753 | ||||||||||
| 16 | 4 | 0 | 8 | 3 | 1 | 24 | 4.956 | ||||||||||
| 16 | 5 | 0 | 9 | 1 | 1 | 24 | 4.832 | ||||||||||
| 16 | 6 | 0 | 10 | 0 | 0 | 24 | 4.962 | ||||||||||
| 16 | 4 | 0 | 11 | 0 | 1 | 18 | 5.321 | ||||||||||
| Team marked | |||||||||||||||||