The Independent Girls Schools Sports Association (IGSSA) was established in 1963 with the inaugural Athletics Carnival at Perry Lakes Stadium. This followed with the first Interschool Swimming Meet in 1965 at Beatty Park Aquatics Centre. In 1967 IGSA drew up a constitution for the Independent Girls’ Schools Athletics Association. The aim was to organise interschool sporting fixtures, which member schools of the Association of Principals of Independent Girls Schools Western Australia were participants, and to establish necessary financial arrangements. In the same year the schools renamed themselves the Independent Girls Schools Sportsmistresses Association.
A review was held of IGSA sport in 1985. Subsequently the name was changed to the Independent Girls Schools Sports Association (Western Australia).
IGSSA provides member schools with the opportunity to compete in a variety of sporting and cultural activities.