| Year: | 1970 |
| League: | NSWRFL |
| League Rank: | 7th |
| Cup: | Challenge Cup |
| League Wins: | 9 |
| League Draws: | 0 |
| League Losses: | 13 |
| Points For: | 374 (58 tries, 98 goals, 2 field goals) |
| Points Against: | 335 (59 tries, 69 goals, 10 field goals) |
| Ceo Title: | CEO |
| Coach: | Tommy Bishop |
| Captain: | Graeme Wilson George Taylforth Tommy Bishop |
| Stadium: | Endeavour Field |
| Avg Attendance: | 6,957 |
| Top Tries: | Tommy Bishop (9) |
| Top Goals: | George Taylforth (95) |
| Top Points: | George Taylforth (202) |
| Prev Season: | 1969 |
| Next Season: | 1971 |
The 1970 Cronulla-Sutherland Sharks season was the 4th in the club's history. They competed in the NSWRFL's 1970 premiership.
| width=20 abbr="Position×" | width=175 | Team | width=20 abbr="Played" | Pld | width=20 abbr="Won" | W | width=20 abbr="Drawn" | D | width=20 abbr="Lost" | L | width=20 abbr="Points for" | PF | width=20 abbr="Points against" | PA | width=20 abbr="Points difference" | PD | width=20 abbr="Points" | 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 | ||||||||||