Hercynia is a name for the ancient Hercynian Forest.
Hercynia or Hercynian may also refer to:
458 Hercynia, an asteroid Hercynian orogeny, a synonym for the Variscan orogeny of the Carboniferous Hercynian massifs, part of the Massif Central of France , a journal published by the Universities and Landesbibliothek of Sachsen-Anhalt, which covers ecology and environmental biology Hercynia, a junior synonym of the ant genus Wasmannia Hercuniates, a tribe of ancient Hercynia
See also Hyrcania (disambiguation) Perkwunos, a possibly related ancient Celtic word