In the late 11th century the Aribonid count Kazelin (Chazelinus) founded Eberndorf Abbey within the Duchy of Carinthia.

Patriarch Ulrich von Aquileia confirmed the establishment in an 1106 deed concerning the translation of the count's mortal remains to the newly built monastery church.

From 1473, the buildings were devastated by Ottoman incursions and a fire, the reconstruction was supervised by Provost Leonhard von Keutschach, the later Prince-Archbishop of Salzburg.

The Habsburg archduke Ferdinand II, ruler of the Inner Austrian lands, had urged him to install a Jesuit residence here.

Seats in the municipal assembly (Gemeinderat) at the 2015 elections: Eberndorf is the birthplace of the Slovene novelist Mimi Malenšek (1919–2012) and the hometown of the prominent lawyer, human rights activist, and politician Rudi Vouk.