| 1966 New South Wales Rugby Football League | |
|---|---|
| Teams | 10 |
| Premiers |  St. George (13th title) |
| Minor premiers | St. George (12th title) |
| Matches played | 95 |
| Points scored | 2715 |
| Attendance | 1293261 |
| Top points scorer(s) |  Bob Lanigan (185) |
| Top try-scorer(s) |  Ken Irvine (13) |
The 1966 New South Wales Rugby Football League premiership was the 59th season of the rugby league competition based in Sydney. Ten clubs from across the city competed for the J.J. Giltinan Shield and the WD & HO Wills Cup during the season, which culminated in a replay of the 1964 grand final between St. George and Balmain.