Illawong Softball Club competes in the Georges River Softball Association competition during the Winter (March-July) and Summer (August-December) seasons.
All games are played at Kelso Park Softball Complex, Henry Lawson Drive, Milperra.
ISC enters teams in the Teeball (U9 and U11), Junior Softball (U13) and Softball (U15, U17, U19, Ladies, Mens and Sunday Mixed) competitions.
ISC has developed many established representative players over the years, with some of them going on to State and Australian representation.
ISC is currently the biggest club in the GRSA competition and has players in the majority of GRSA representative teams.