The Penrith District Junior Rugby League (PDJRL) is an Australian amateur rugby league competition for senior and junior rugby league clubs in the Penrith, Blacktown, and Blue Mountains area.
The competition was founded in 1912 and grew gradually as more clubs from the surrounding areas entered the competition. The first Penrith club were the Waratahs and adopted the blue and white colours, playing out of Penrith Showground. When the Parramatta District Rugby League was formed all the teams from the Penrith and surrounding areas affiliated and played in the Parramatta League. During the early-1960s the NSWRL Second Division was formed where a team from Penrith began playing, in 1967 the now Penrith Panthers were promoted to the NSWRL First Grade competition in that year the following clubs were invited to enter the Penrith District Junior Rugby League; Blacktown, Blacktown Workers, Blacktown St Patricks, Emu Plains, Londonderry Mount Druitt, Penrith Waratahs, Riverstone, Rooty Hill, Richmond, Springwood, Windsor, Warragamba, Warrimoo and St Marys.
The number of clubs in the 1970s grew gradually and more than doubled to 32 clubs. During the late-1980s it was decided to reduce number of clubs to 22. Some teams were either merged or became standalone clubs;
