Gull Bay First Nation or Kiashke Zaaging Anishinaabek (Gayaashki-zaagiing Anishinaabeg in the Fiero orthography) is an Anishinaabe (Ojibway) First Nation located in Thunder Bay District in northwestern Ontario, Canada. It is approximately 175 kilometres (109 mi) north of Thunder Bay, Ontario on Highway 527 on the western shore of Lake Nipigon.