Ninilchik is a census-designated place in Kenai Peninsula Borough, Alaska, United States. At the 2010 census the population was 883, up from 772 in 2000. It is considered an Alaska Native village under the Alaska Native Claims Settlement Act. In the 1970s, villagers formed the Ninilchik Native Association Incorporated. Later the Ninilchik Traditional Council was established as the government of Alaska Natives in this area.