Østfold is a county in southeastern Norway, bordering Akershus. It borders to southwestern Sweden (Västra Götaland County and Värmland). In 2002 there were 252,746 inhabitants, which is 5.5% of the total population in Norway. Its area is 4,183 km². The county administration is in Sarpsborg.
Østfold is located between the Oslo Fjord and Sweden. It is a hilly landscape with a lot of woodland. The towns Askim, Fredrikstad, Moss, Mysen, Halden, and Sarpsborg are located here (Østfold has the most towns of any county in Norway). The rivers Glomma and Tistedalselva run through the district. Østfold is perhaps the nation's oldest inhabited region, with rock drawings and mounds throughout the area. Many manufacturing communities are situated here. Moss and Fredrikstad have shipyards.
