In 2004, the Island School Alumni Association was formed through a grant from a generous donor and includes any graduated student who attended Island School since 1977. Its purpose is to advance the interests of Island School by engaging members to contribute their expertise, encourage fellowship, and provide social and professional opportunities in a culture of camaraderie and giving. The yearly activities of the ISAA include a holiday reception in December, participation in an activity booth at the Annual Harvest Fest, an annual alumni soccer game, and various get-togethers during the school year. Communication occurs regularly through social media and email.