Parramatta Junior Rugby League formed in 1946, when, as a result of expanding urban sprawl an influx of residents flocked to the immediate Parramatta area in Sydney, this caused a compacted competition to be formed and the Western Districts and Southern Districts competitions were revamped. In its fledgling years the competitions took in teams from far adrift as Liverpool and St Marys and just about every town on the Cumberland plateau.

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The Parramatta Junior Rugby League currently consists of 22 clubs in the Saturday competition all age groups and seven clubs in the Sunday Parramatta district Convents RL for under-6s to under-12s only. It is represented by 362 teams and 6,500 players covering a vast area which consists of five local government council areas—Hills Shire, Parramatta City, Blacktown city, Cumberland city and Fairfield city.

Note: no opens were found for 2020.

• Balmain District Junior Rugby League
• Cronulla-Sutherland District Rugby Football League
• Manly-Warringah/North Sydney District Rugby League
• Penrith District Rugby League
• South Sydney District Junior Rugby Football League
• Sydney Roosters Juniors
• List of rugby league competitions in Australia