The 1970 Cronulla-Sutherland Sharks season was the 4th in the club's history. They competed in the NSWRFL's 1970 premiership.
Ladder
| Team | Pld | W | D | L | PF | PA | PD | Pts | |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  South Sydney
|
22 | 17 | 1 | 4 | 479 | 273 | +206 | 35 |
| 2 |  Manly-Warringah
|
22 | 16 | 1 | 5 | 422 | 285 | +137 | 33 |
| 3 |  St. George
|
22 | 15 | 0 | 7 | 408 | 329 | +79 | 30 |
| 4 |  Canterbury-Bankstown
|
22 | 14 | 0 | 8 | 308 | 269 | +39 | 28 |
| 5 |  Eastern Suburbs
|
22 | 13 | 0 | 9 | 386 | 320 | +66 | 26 |
| 6 |  Balmain
|
22 | 12 | 1 | 9 | 380 | 347 | +33 | 25 |
| 7 |  Cronulla-Sutherland
|
22 | 9 | 0 | 13 | 374 | 335 | +39 | 18 |
| 8 |  Newtown
|
22 | 9 | 0 | 13 | 345 | 409 | -64 | 18 |
| 9 |  North Sydney
|
22 | 7 | 1 | 14 | 332 | 435 | -103 | 15 |
| 10 |  Penrith
|
22 | 7 | 1 | 14 | 292 | 406 | -114 | 15 |
| 11 |  Western Suburbs
|
22 | 6 | 1 | 15 | 329 | 403 | -74 | 13 |
| 12 |  Parramatta
|
22 | 4 | 0 | 18 | 240 | 484 | -244 | 8 |