This article does not cite any sources. Please help by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: – ···scholar·JSTOR(December 2009) (Learn how and when to remove this template message)
Karl August Erich Obst (13 September 1886 – 9 June 1981) was a Germangeographer and geopolitician. Between 1924 and 1944 he was the editor of the German geopolitical magazine "Zeitschrift fur Geopolitik".