Warilla sealed the Grade 1 Illawarra District Women's pennant flag and will defend their state title in the NSW finals in August.
Warilla won the six-round Illawarra pennant flag by seven points from Wiseman Park, after only four clubs entered a side.
Warilla beat Wiseman Park 5-0 in their final-round match last Thursday and Dapto Citizens finished third despite a 4-1 loss to Figtree RSL.
The state finals will be held at Port Stephens on August 25-29.
The regional finals for the Illawarra lower-grade champions will be held by the Southern Highlands Association winners on June 24-25.
Meanwhile, all Illawarra women's Grade 2 matches were called off last Tuesday after Monday's torrential rain.
In Grade 2 pennants, Shellharbour last Thursday scored a round 10 4-1 win over Windang.