Schreiber is a municipal township in the Canadian province of Ontario, located on the northernmost point of Lake Superior along Highway 1…Schreiber is a municipal township in the Canadian province of Ontario, located on the northernmost point of Lake Superior along Highway 17. The town, with a population of approximately 1100 people, is almost completely located inside the geographic township of Priske, with a small western portion of the town in the southeast of Killraine Township.