Hedmark was a county in Norway before 1 January 2020, bordering Trøndelag to the north, Oppland to the west and Akershus to the south. The county administration is in Hamar.
Hedmark and Oppland counties were merged into Innlandet county on 1 January 2020, when Norway's former 19 counties became 10 bigger counties / regions
Hedmark made up the northeastern part of Østlandet, the southeastern part of the country. It had a long border with Sweden to the east. The largest lakes were Femunden and Mjøsa, the largest lake in Norway. Parts of Glomma, Norway's longest river, flowed through Hedmark. Geographically,
Wikipedia https://en.wikipedia.org/wiki/Hedmark
Coordinates 60°47'44.148" N 11°4'28.578" E