Achen may refer to:
Achen (surname) Achen, Moselle, a commune in the Grand Est region of France Tiroler Achen, a river in Austria Achen Lake, a lake in Tyrol, Austria Achen Pass, a pass in the Alps between Austria and Germany Achen, a small village by the Mekong River in Kratié Province, Cambodia Achen, Malayalam word for Father, also used for addressing Christian priests and presbyters in Malayalam
See also Aachen (disambiguation)