Duke of Samsø was a title created for Canute Porse the Elder in the 14th century which was later recreated as the Landgraviate of Samsø in the 18th century.
Then the Island was part of the crown domain until the end of the 14th century when it was pledged to the Bishop of Aarhus. However it was redeemed to the Danish crown in 1407.
Later the Island was under royal control and was granted to Sophie Amalie Moth mistress of Christian V of Denmark. The title descended to their children. Under Danish law all sons of the titled nobility inherited the title but the estate was kept by the eldest male resulting in many offshoots.[1]
| Valdemar the Young | 1209 | 1215-1231 | 1231 | House of Estridsen | Eleanor of Portugal, Queen of Denmark | Possibly Held Samso as he was crowned Junior king on the island | |
| Albert I, Duke of Brunswick | 1236 | 1253 | 1279 | House of Welf | Elizabeth of Brabant | Pledged to Albert[2] | |
| Stig Andersen Hvide | 13th century | 1289 | 1293 | Hvide | Occupied the island briefly | ||
| Christopher II of Denmark | 1276 | 1307-1326 | 1332 | House of Estridsen | Euphemia of Pomerania | Granted by his brother when he was not king | |
| Canute Porse the Elder | 1282 | 1326-1330[3] | 1330 | Ingeborg of Norway | Married Royalty, granted Samso by the Danish king | ||
| Ingeborg of Norway | 1301 | 1330-1344 | 1361 | House of Sverre | Canute Porse the Elder | Inherited from her husband, eventually lost the island to the king |
| Sophie Amalie Moth | 1654 | 1777-1698 | 1719 | Moth (noble family) | Christian V of Denmark | She was the mistress of Christian V who he granted the title to | |
| Christian Gyldenløve | 1674 | 1698-1703 | 1703 | Gyldenløve | Charlotte Amalie Danneskiold-Laurvig | Illegitimate Son of Christian V of Denmark and the preceding | |
| 1702 | 1703-1728 | 1728 | Danneskiold-Samsøe | Conradine Christiane Friis, Christina Catharina von Holstein | Son of the preceding | ||
| Frederik Danneskiold-Samsøe | 1703 | 1703-1770 | 1770 | Danneskiold-Samsøe | Brother of the preceding | ||
| Frederik Christian Danneskiold-Samsøe | 1722 | 1728-1778 | 1778 | Danneskiold-Samsøe | Nicoline Rosenkrantz | ||
| Christian Conrad Sophus Danneskiold-Samsøe | 1774 | 1778-1823 | 1823 | Danneskiold-Samsøe | Henriette Danneskiold-Samsøe | Son of the preceding | |
| 1798 | 1823-1869 | 1869 | Danneskiold-Samsøe | Son of the preceding | |||
| Christian Conrad Sophus Danneskiold-Samsøe II | 1800 | 1869-1886 | 1886 | Danneskiold-Samsøe | Wanda Sophie Elisabeth Candia Zahrtmann | Son of the preceding | |
| Christian Danneskiold-Samsøe | 1838 | 1886-1914 | 1914 | Danneskiold-Samsøe | Son of the preceding | ||
| Aage Danneskiold-Samsøe | 1886 | 1914-1945 | 1945 | Danneskiold-Samsøe | Son of the preceding |