Landgrave of Langeland was a territorial title for the ruler of Langeland in Denmark. The county had its roots in the 1358 conquest of Langeland by Valdemar IV of Denmark against the Duke of Schleswig. Its capital was Tranekær Castle a 13th-century castle.
Before it was a separate lordship it was part of the Duchy of Schleswig. It was separated from the Duchy and given to a brother of the Duke of Schleswig. Langeland was assigned as a fief in the middle ages to various different people. These are the original lords of Langeland. In 1659 with the permission of the king the Count of Rantzau handed Tranekær county over to Frederik Ahlefeldt. He later became the Landgrave of Langeland in 1672.
List of Landgraves of Langeland +RulerBornReignDeathHouseConsortNotesAbel, Lord of Langeland12181257-12791279Estridsena daughter of Gunzelin III, Count of SchwerinSplit with brother Eric I, Duke of SchleswigEric Longlegs, Lord of Langeland12721279-13101310EstridsenSophia of QuerfurtNephew of the preceding
+RulerBornReignDeathHouseConsortNotesFrederik Ahlefeldt16231672-16861686Ahlefeldt (noble family)Margarethe Dorothea zu RantzauTitle created forFrederik Ahlefeldt II16621686-17081708Ahlefeldt (noble family)Christiane Gyldenløve (1672-1689)Son of the precedingCarl Ahlefeldt16701708-17221722Ahlefeldt (noble family)Ulrikke Antoinette Danneskiold-LaurvigBrother of the precedingFrederik Ahlefeldt III17021722-17731773Ahlefeldt (noble family)Marie Elisabeth AhlefeldtSon of the precedingUlrik Carl Ahlefeldt17041722-17581758Ahlefeldt (noble family)Brother of the Preceding, apparently shared the titleConrad Ahlefeldt17071722-17911791Ahlefeldt (noble family)Brother of the Preceding, apparently shared the titleFerdinand Ahlefeldt17471791-18151815Ahlefeldt (noble family)Son of the precedingFrederik Carl Christian Ulrich Ahlefeldt17421791-18251825Ahlefeldt (noble family)Ditlefine RantzauOlder brother of the precedingChristian Ahlefeldt-Laurvigen17321173-17911791Ahlefeldt (noble family)Elisabeth grevinde JuelSon of Frederik Ahlefeldt IIIFrederik Ahlefeldt-Lauervigen17601791-18321832Ahlefeldt (noble family)Casta Magdalene RasmussenSon of the precedingChristian Johan Frederik Ahlefeldt-Laurvig17891832-18561856Ahlefeldt (noble family)Nephew of the precedingFrederik Ludvig Vilhelm Ahlefeldt-Lauervigen18171856-18891889Ahlefeldt (noble family)Marie Albertine Mathilde Ahlefeldt-LaurvigenSon of the precedingChristian Johan Frederik Ahlefeldt-Laurvig II18441889-19171917Ahlefeldt (noble family)Johanne Ida Birgitte AugustaSon of the precedingFrederik Ludvig Vilhelm Ahlefeldt-Laurvig II18701917-19471947Ahlefeldt (noble family)No wifeSon of the precedingKai Benedict Ahlefeldt-Laurvig19031947-19851985Ahlefeldt (noble family)Nephew of the precedingUlrik Benedict Ahlefeldt-Laurvig19391985-20212021Ahlefeldt (noble family)Son of the precedingMichael Ahlefeldt-Laurvig-Bille19652021–presentaliveAhlefeldt (noble family)Princess Alexandra of Sayn-Wittgenstein-BerleburgNephew of the preceding
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