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, Malayalam word for Father, also used for addressing Christian priests and presbyters in Malayalam
See also
* Aachen (disambiguation)
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