The locals needed just one win on Tuesday morning, and despite losing 3-2 to Western Australia, did enough to guarantee victory and successfully defend their 2011 title.
Queensland Team Captain Gennai Goodwin said the team was excited with the win.
"It's a great way for a lot of us to finish our junior careers," Goodwin said.
Nadine White (Pacific) and Lauren Mason (Horton Park) were undefeated for the Queenslanders.
All players except for Dee Dee Russell (Coolangatta-Tweed) will finish their time in the junior ranks this year.
Western Australia finished in second place, 3 Ã‚Â½ matches behind Queensland with Alyssa Keir (The Vines) undefeated.
New South Wales finish in third place, one match ahead of Victoria in fourth place. 2011 Australian Junior Champion Cathleen Santoso was undefeated for the NSW side.
South Australia finished in fifth place.
Gennai Goodwin (Captain) (Mossman)
Lauren Mason (Horton Park)
Tiffany-Claire Lewis (Pelican Waters)
Victoria Fricot (Peregrine Springs)
Dee Dee Russell (Coolangatta-Tweed)
Nadine White (Pacific