Hedmark County Municipality (Norwegian: Hedmark fylkeskommune) was the regional governing administration of the old Hedmark county in Norway. The county municipality was established in its most recent form on 1 January 1976 when the law was changed to allow elected county councils in Norway. The county municipality was dissolved on 1 January 2020, when Hedmark was merged with the neighboring Oppland county, creating the new Innlandet county which is led by the Innlandet County Municipality. The administrative seat is located in Hamar and the county mayor was of the Centre Party.