The 1910 NSWRFL season was the third season of the New South Wales Rugby Football League premiership, Sydney’s top-level rugby league club competition, Australia’s first. Eight teams from across the city contested during the season for the premiership and the Royal Agricultural Society Challenge Shield. During the season, many of the league’s top players took part in matches of the 1910 Great Britain Lions tour of Australia.

The 1909 New South Wales Rugby Football League premiership was the second season of Sydney's top-level rugby league football competition, Australia's first. Eight teams contested during the season for the premiership and the Royal Agricultural Society Challenge Shield; seven teams from Sydney and one team from Newcastle, New South Wales.