Illawong Softball Club teams compete in Georges River Softball Association competitions during the Summer seasons.
Games are played at Kelso Park North Softball Complex, Henry Lawson Drive, Milperra and Jacqui Osmond softball grounds, Warwick Farm.

Illawong enters teams in the Saturday morning, mixed T-Ball (6 to under 10 yrs old) and mixed Modball (Under 12 yrs old), mixed Softball (Under 15 years) competitions, and the Saturday afternoon Ladies competition. In the 2025/26 season, Illawong will also field a team in the  mid-week Babes competition (Under 7 years).

Over the years, Illawong players and officials have represented Georges River Softball Association, Softball NSW and Softball Australia at State, National and International tournaments.