Haute-Marne is a department in the Grand Est region of Northeastern France. Named after the river Marne, its prefecture is Chaumont. In 2…Haute-Marne is a department in the Grand Est region of Northeastern France. Named after the river Marne, its prefecture is Chaumont. In 2019, it had a population of 172,512. Haute-Marne is one of the original 83 departments created during the French Revolution on March 4, 1790. It was created from parts of the former provinces of Champagne, Burgundy, Lorraine and Franche-Comté.