The 1977 NSWRFL season was the 70th season of Sydney's professional rugby league football competition, the New South Wales Rugby Football League premiership. Twelve clubs, including six of 1908's foundation teams and another six from around Sydney competed for the J. J. Giltinan Shield and WD & HO Wills Cup during the season, which culminated in a grand final between the St. George and Parramatta clubs. NSWRFL teams also competed for the 1977 Amco Cup.