Hedmarken (Urban East Norwegian: [ˈhêːdmɑrkn̩], locally [ˈhæ̂ɪmɑrçɑ, ˈhɛ̂m-]; known as Hedemarken [ˈhêːdəmɑrkn̩] until 2003)[1] is a traditional district in Innlandet county in Eastern Norway.

[2] Traditionally, it also included Gjøvik on the other side of the lake, but this is no longer the case.

[4] The district is dominated by rolling agricultural terrain, hilly green mountains, and pine forests.

The first element is heiðnir, the name of an old Germanic tribe and is related to the word heið which means "moorland".

[5] In the early Viking Age, before Harald Fairhair, Hedmarken was a petty kingdom, part of the Eidsivating.