Carl-Hans Graf von Hardenberg (October 22, 1891 – October 24, 1958) was a German politician and landowner.
Carl-Hans Graf von Hardenberg was born in Glogau Silesia, Germany (now Głogów, Lower Silesian Voivodeship). He was part of the nobility of Lower Saxony and entered the German army. In 1914 he married Renate von der Schulenburg. He was wounded several times during World War I. In 1921, having reached the rank of major, he gave up his military commission and settled at his mansion in Neuhardenberg. Besides his farming, he was active in communal politics, engaged in administration of the district of Lebus in the province of Brandenburg, and was active in the Protestant noblemen's Order of Saint John. When the National Socialist Party came to power in 1933, Hardenberg refused to join any of the party-sponsored organizations and was removed from all his positions.
In 1939 he was called for military duty as major in the military reserve force. In 1940 he was assigned to Army Group B where he met Major General Henning von Tresckow and became involved in the resistance against Hitler. In 1942 he was transferred to Berlin where he came into contact with colonel Claus Schenk Graf von Stauffenberg and began organizing for the plot for the assassination of Hitler. Many of the meetings of the conspirators took place at the Neuhardenberg mansion, which was located at 70 km from Berlin and was not under police supervision. Had the coup d'état succeeded according to the initial plan, Hardenberg would have taken the position of prime minister of Berlin-Brandenburg.