Varteig is a village in Sarpsborg and was formerly a municipality in Østfold County, Norway.
Varteig is located north of Sarpsborg and east of Glomma. Varteig was part of the Tune municipality until 1861. It was designated to be a municipality by a split from Tune in 1861. At that time Varteig had a population of 1,405. On 1 January 1992 a small part of the district Furuholmen, with 12 inhabitants, was moved to Rakkestad municipality. The rest of Varteig was incorporated into Sarpsborg along with Tune and Skjeberg.
Varteig is probably best known as the home place of Inga of Varteig (born about 1185, died 1234), mother of Håkon Håkonson, king of Norway from 1217 to 1263.