Rapp or RAPP may refer to:
* Rapp (surname)
*Rapp, West Virginia
* HNoMS Rapp, HNoMS ''Rapp'', the name of several Norwegian navy ships
* Russian Association of Proletarian Writers
* Fort Rapp, a fort in France
* Rapp Motorenwerke, early 20th-century German aircraft engine manufacturer and predecessor to BMW
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