| Year: | 1990 |
| League: | NSWRL |
| League Rank: | 10th |
| Cup: | Challenge Cup |
| League Wins: | 11 |
| League Draws: | 0 |
| League Losses: | 11 |
| Points For: | 370 (60 tries, 64 goals, 2 field goals) |
| Points Against: | 359 (60 tries, 59 goals, 1 field goal) |
| Ceo Title: | CEO |
| Coach: | Allan Fitzgibbon |
| Captain: | David Hatch |
| Stadium: | Caltex Field |
| Avg Attendance: | 9,893 |
| Top Tries: | Andrew Ettingshausen (12) |
| Top Goals: | Alan Wilson (37) |
| Top Points: | Alan Wilson (102) |
| Prev Season: | 1989 |
| Next Season: | 1991 |
The 1990 Cronulla-Sutherland Sharks season was the 24th in the club's history. Coached by Allan Fitzgibbon and captained David Hatch, they competed in the NSWRL's 1990 Winfield Cup premiership. The Sharks finished the regular season in 10th place (out of 16), failing to reach the finals.
| width=175 | Team | Pld | W | D | L | PF | PA | PD | Pts | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Canberra | 22 | 16 | 1 | 5 | 532 | 245 | +287 | 33 | |
| 2 | Brisbane | 22 | 16 | 1 | 5 | 478 | 278 | +200 | 33 | |
| 3 | Penrith | 22 | 15 | 1 | 6 | 415 | 286 | +129 | 31 | |
| 4 | Manly-Warringah | 22 | 15 | 0 | 7 | 395 | 255 | +125 | 30 | |
| 5 | Balmain | 22 | 14 | 0 | 8 | 432 | 284 | +148 | 28 | |
| 6 | Newcastle | 22 | 13 | 2 | 7 | 344 | 305 | +39 | 28 | |
| 7 | Canterbury-Bankstown | 22 | 12 | 1 | 9 | 354 | 291 | +65 | 25 | |
| 8 | Parramatta | 22 | 12 | 1 | 9 | 387 | 347 | +40 | 25 | |
| 9 | Illawarra | 22 | 11 | 1 | 10 | 366 | 361 | +5 | 23 | |
| 10 | Cronulla-Sutherland | 22 | 11 | 0 | 11 | 370 | 359 | +11 | 22 | |
| 11 | North Sydney | 22 | 10 | 0 | 12 | 322 | 298 | +24 | 20 | |
| 12 | St. George | 22 | 8 | 0 | 14 | 371 | 399 | -28 | 16 | |
| 13 | Western Suburbs | 22 | 6 | 1 | 15 | 323 | 433 | -110 | 13 | |
| 14 | Eastern Suburbs | 22 | 6 | 1 | 15 | 283 | 547 | -264 | 13 | |
| 15 | Gold Coast-Tweed | 22 | 4 | 0 | 18 | 233 | 567 | -334 | 8 | |
| 16 | South Sydney | 22 | 2 | 0 | 20 | 302 | 652 | -350 | 4 |