Queensland, NSW, ACT, Victoria, and Western Australia will all be represented in the 15-a-side, six-week league, with a final to be played in April.
The announcement came on the same day Rugby Australia outlined its plans to bid for the 2021 Women's Rugby World Cup.
"I am really proud and excited about this competition launching next year and what this means for the game in Australia," Wallaroos captain Shannon Parry said.