Fosby From Wikipedia, the free encyclopedia Fosby is the administrative centre of Aremark, Norway. Its population in 2005 is 318.[1] ↑ "Fosby - Population Trends and Demographics - CityFacts". www.city-facts.com. Retrieved 2021-01-12. 59°13′N 11°42′E / 59.217°N 11.700°E / 59.217; 11.700 This Østfold location article is a stub. You can help Wikipedia by expanding it.vte Related Articles