ISFiC, or "Illinois Science Fiction in Chicago", is a non-profit organization best known for running the Windycon science fiction convention.
ISFiC was formed in 1973 as a coalition of the various science fiction clubs in Chicago, Illinois, United States. In addition to being the parent organization for an annual convention, it would also serve as a clearing house for fan activities in Illinois. The founders of the organization included Larry Propp, Mark and Lynne Aronson, Ann Cass, Jon and Joni Stopa and Mike and Carol Resnick.
Each summer, ISFiC holds a small picnic, named Picnicon after the generally accepted science fiction naming conventions.