Gull Bay First Nation or Kiashke Zaaging Anishinaabek (Gayaashki-zaagiing Anishinaabeg in the Fiero orthography) is an Anishinaabe (Ojibway) First Nation band government 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. As of May 2010, the First Nation had a registered population of 1,149 people, including an on-Reserve population of 328.