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