Kappa Kappa Gamma (ΚΚΓ) ("Kappa") is a collegiate sorority, founded at Monmouth College in Monmouth, Illinois, United States. Although the groundwork of the organization was developed as early as 1869, the 1876 Convention voted that October 13, 1870 should be recognized as the official Founders Day, because no earlier charter date could be determined. This makes Kappa Kappa Gamma one of the oldest extant women's Greek-letter societies.