Hamar is a town and municipality in Hedmark county, Norway. It is part of the traditional region of Hedmarken. The administrative centre of the municipality is the town of Hamar. The municipality of Hamar was separated from Vang as a town and municipality of its own in 1849. Vang was merged back into Hamar on 1 January 1992.
The town is located on the shores of lake Mjøsa, Norway's largest lake, and is the principal city of Hedmark county. It is bordered to the northwest by the municipality of Ringsaker, to the north by Åmot, to the east by Løten, and to the south by Stange.