Each state/territory enters two "under 18 girls" eight ball athletes as part of their state/territory team to the Australian Eight Ball Junior Champions (Junior Nationals). Each under 18 athlete plays every other under 18 athletes in individual matches (best of "5" five frames). These matches are know as the under 18 girls singles round robin event. At the conclusion of the round round the top 4 athletes contest the semi finals and winners progress to the Grand Final.

Year Host   Winner     Runner-Up  
2020 ACT  QLD Temika Jenkins 6 2 Emily Sanders  NT
2019 TAS VIC Teah Raeburn 6 3 Emily Sanders  NT
2018 SA WA Holly Va'aelua 6 3 Kyra Rikys  WA
2017 NT WA  Holly Va'aelua 6 2 Teah Raeburn VIC
2016 WA VIC  Isabella Di Giorgio  6 3 Stella Kearney  WA
2015 QLD WA  Stella Kearney  6 1 Isabella Di Giorgio  VIC