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.
|AUSTRALIAN JUNIOR CHAMPION: UNDER 18 GIRLS|
|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|