Tranekær Manor(Danish: Tranekær Gods) is a manor house and estate on Langeland, Denmark. The red-plastered, two-winged main building is perched on a small hill on the northern outskirts of the village Tranekær. It originates in a four-winged Medieval castle of which the south and east wings were demolished in the 1720s. It owes its current appearance to a comprehensive renovation undertaken by the architect Niels Sigfred Nebelong in 1859–1863. The main building, a theatre building, a stable, a carriage house and a garden pavilion were listed on the Danish registry of protected buildings and places in 1918. Tranekær has belonged to members of the Ahlefeldt family since 1659.

Carl von Ahlefeldt was a German-Danish statesman. He was a stadtholder and by birth a member of the House of Ahlefeld. He was part of the inner circle around Frederick IV until 1712 and then became Governor-general of Slesvig-Holsten.